JP2000177345A - Structure of traction hook for motor vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the rigidity of the base end part of a traction hook plate by providing a traction hook hole on the tip of the traction hook plate, and forming the base end of this plate into a closed sectional profile. SOLUTION: A traction hook plate 2 to be fixed to a body frame pipe 1 by welding is formed of an upper plate 3 and a lower plate 4, and the upper plate 3 is made of a sheet metal molded in U-shape opened in the lower surface. A traction hook hole 5 is formed in the tip of the plate surface 3a of the upper plate 3, and a wall surface 3b is formed on the circumference except the base end of the plate surface 3a, and the connecting part 6 of the base end part is connected to the body frame pipe 1. The upper end 4a of the lower plate 4 is connected to the plate surface 3a reverse side in the middle of the upper plate 3, and the lower end 4b thereof is connected to both-side wall surfaces 3b of the upper plate 3 to form a box-shaped closed section, whereby the traction hook plate 2 excellent in rigidity is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a towing hook of an automobile mounted for towing an automobile.

[0002]

2. Description of the Related Art As shown in FIG. 5, a vehicle is provided with a towing hook 100 on the lower surface side of a vehicle body 101 so that the vehicle can be towed when the vehicle is conveyed or when another vehicle is used in the event of failure. The towing hook 100 is used when towing.

[0003] Various towing hooks 100 are known, and a round bar is formed by bending a round bar into a U-shape.
(See FIG. 6), a U-shaped plate 103 with a tow hook hole 103a formed thereon (see FIG. 7) 104, a thick plate 105 with a tow hook hole 105a formed 106
(See FIG. 8).

[0004]

However, tow hooks 102, 104, 104 made of round bar or sheet metal are used.
In the case 106, the impact is transmitted to the frame pipe on the vehicle body side to which the towing hooks 102, 104, 106 are attached through the towing hooks 102, 104, 106, and the frame pipe may be deformed.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a structure of a towing hook for an automobile capable of absorbing an impact.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a towing hook plate having a towing hook hole at a tip end thereof, a closed section formed at a base end of the towing hook plate, and towing. The rigidity of the base end of the hook plate. Further, the present invention provides the above-mentioned tow hook plate, comprising an upper plate and a lower plate extending from the vehicle body, forming the upper plate into a U-shaped cross section with an open lower surface, and providing a tip portion of the upper plate. A tow hook hole is provided, a distal end portion of a lower plate is joined to a rear surface of an intermediate portion of the upper plate, and base ends of the upper plate and the lower plate are joined to a vehicle body to form a closed cross section. And the tip of the tow hook plate is kept with the strength of the upper plate only, and the base end of the tow hook plate is composed of a closed cross section with the upper plate and the lower plate to maintain high strength rigidity I have. The tow hook plate absorbs shock at the distal end and maintains strength at the proximal end.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2, a tow hook plate 2 is fixed to a body frame pipe 1 by welding. The towing hook plate 2 includes an upper plate 3 and a lower plate 4.

The upper plate 3 is made of sheet metal and has a U-shaped cross section with an open lower surface.
A towing hook hole 5 is formed at the tip of the plate surface 3a.
A joint portion 6 for joining to the vehicle body frame pipe 1 is formed at a base end portion of the body frame pipe 1. A wall surface 3b is provided around the periphery of the plate surface 3a except for the base end portion.
Has a flange portion 7 at the lower end on the base end side. The lower plate 4 is formed by bending an upper end 4a and a lower end 4b of the plate in opposite directions, and has joining flanges 4c, 4c on both sides of the plate. The lower plate 4 has an upper end 4a joined to the rear side of the plate surface 3a in the middle of the upper plate 3, and a lower end 4b joined to both side walls 3b of the upper plate 3 via joining flanges 4c, 4c. ing.
The joining flange portions 4c, 4c provided on both sides of the lower plate 4 are provided on the wall surfaces 3b on both sides of the upper plate 3.
And the upper plate 3 and the lower plate 4 are joined at their base ends to the vehicle body frame pipe 1 to form a box-shaped closed cross section 8.

According to the above construction, when an impact load is applied to the tip of the towing hook plate 2, the upper plate 3
Since the tip portion of is composed of a single plate, deformation of this portion reduces the load initially generated. At the base end of the towing hook plate 2, the upper plate 3 and the lower plate 4 are joined to the body frame pipe 1 to form a box-shaped closed section 8. Effectively absorb loads. Therefore, the load is dispersed and transmitted over a wide range of the body frame pipe 1, and the deformation of the body frame pipe 1 can be prevented. Since the flange portion 7 is formed only on the lower end on the base end side on the wall surface 3b on both sides of the upper plate 3, the rigidity of the closed section 8 is improved. On the other hand, since the flange 7 is not provided at the front end portion than the box-shaped closed cross section 8, the rigidity of the front end portion can be reduced.

FIGS. 3 and 4 show a modification of the present invention. In FIG. 3, holes 9 are formed in the wall surfaces 3b on both sides of the towing hook holes 5, so that the impact can be effectively absorbed. The groove shown in FIG. 4 has grooves 10 formed on both sides of the towing hook hole 5 and the wall surfaces 3b on both sides, so that the shock can be effectively absorbed similarly.

The present invention is not limited only to the above-described embodiment. For example, the mounting position of the towing hook plate 2 is not limited to the body frame pipe 1 but may be any structure on the body side. , Can be installed anywhere. Further, the size of the box-shaped closed section 8 of the towing hook plate 2 can be arbitrarily set, and the length of the tip end of the upper plate 3 can be set as required.

[0012]

As described above, according to the structure of the towing hook of the automobile according to the present invention, the following effects can be obtained. A towing hook hole is provided at the tip of the towing hook plate, and a closed cross section is formed at the base end of the towing hook plate. Can be prevented. The tow hook plate, the tow hook plate is composed of an upper plate and a lower plate extending from the vehicle body, and the upper plate is formed in a U-shaped cross section with an open lower surface, and a tip portion of the upper plate is formed. A tow hook hole is provided in the lower plate, and the front end of the lower plate is joined to the rear surface of the middle part of the upper plate. The base end of the upper plate and the lower plate are joined to the vehicle body to form a closed cross section. Since the distal end of the hook plate is formed weak and the proximal end is formed strong, the distal end absorbs impact, and the proximal end can effectively disperse the load on the vehicle body side to prevent deformation on the vehicle body side. The flange portion is provided at the lower end on both sides of the base end of the upper plate formed in a U-shaped cross section, so that the initial impact load can be absorbed by the tip of the upper plate. Since a hole or groove is provided near the tip where the towing hook hole of the upper plate is provided,
The initial impact load can be absorbed by the tip of the upper plate.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a structure of a towing hook of a vehicle according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 3;

FIG. 3 is a perspective view showing a modification of FIG.

FIG. 4 is a perspective view showing a modification of FIG.

FIG. 5 is a perspective view showing a structure of a conventional towing hook of an automobile.

FIG. 6 is a perspective view showing a conventional towing hook.

FIG. 7 is a perspective view showing a conventional towing hook.

FIG. 8 is a perspective view showing a conventional towing hook.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body frame pipe 2 Towing hook plate 3 Upper plate 4 Lower plate 5 Towing hook hole 6 Joint 7 Flange 8 Closed cross section 3a Plate surface 3b Wall 4a Upper end 4b Lower end 4c Joint flange

Claims (4)

[Claims] 1. A structure of a towing hook for an automobile, wherein a towing hook hole is provided at a distal end of the towing hook plate, and a closed cross section is formed at a base end of the towing hook plate. 2. The towing hook plate comprises an upper plate and a lower plate extending from a vehicle body,
The upper plate is formed to have a U-shaped cross section with an open lower surface, a towing hook hole is provided at the tip of the upper plate, and the tip of the lower plate is joined to the rear surface of the intermediate portion of the upper plate. 2. The structure of a towing hook for an automobile according to claim 1, wherein the base end of the plate is joined to the vehicle body to form a closed cross section. 3. The structure of a towing hook for an automobile according to claim 2, wherein flanges are provided at lower ends on both sides of a base end of the upper plate formed in a U-shaped cross section. 4. The structure of a towing hook for an automobile according to claim 2, wherein a hole or a groove is provided near a tip portion of the upper plate where the towing hook hole is provided.