JPH107032A - Structure of towing hook for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To crush a crush part in a relatively easy manner, and to secure the necessary cush length in collision by providing a fixing part to be fixed to a tip of a vehicle frame, a curved part to be curved toward the rear part of a vehicle, and a locking part to be projected toward a forward part of the vehicle. SOLUTION: A hook 1 comprises two vertically fixed parts 5, 5 to be fixed to a bracket, suspended parts 6, 6 to be suspended downward, curved parts 7, 7 to be curved toward a rear part of a vehicle, and a U-shaped locking part 8. When a vehicle is head-on collided, the bending moment of the distance (h) × collision force is applied to a lower end of the fixed part 5 because the locking part 8 is projected more toward a forward part of the vehicle than a tip 2 of a side member 50. The hook 1 is easily deformed. As a result, a crush part 53 at the tip of the side member 50 is crushed, and its shock absorbing function sufficiently works. The required crush length can be sufficiently secured.

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 provided at the end of a frame such as a side member of a vehicle so as to be used for towing a cab-over vehicle as shown in FIG. And, in particular,
The present invention relates to a structure of a towing hook which is designed not to impair the shock absorbing function of a crash portion for absorbing a shock at the time of a frontal collision of a vehicle.

[0002]

2. Description of the Related Art FIG. 8 schematically shows a front end of a frame of a cab-over vehicle.
The frame F is composed of the pair of side members 50, 50 and the cross member 51 joined at a right angle thereto. FIG. 9 is a side view of the side member 50.
As shown in FIG. 7, a plurality of crash portions 53 are formed at an appropriate pitch in the vehicle front-rear direction at the tip 50a of the side member 50 facing the front bumper 52. As shown in FIG. 10 which is a cross-sectional view taken along the line AA in FIG. 9, the crash portion 53 is formed in a bead shape bulging toward the inside of the side member 50. The crash portion 53 is configured to be easily crushed to absorb a shock. As shown in FIG. 9, a hook 54 for hanging a rope when the vehicle is towed is screwed to the lower surface of the tip of the side member 50. The details of the conventional hook 54 are as shown in FIG. 11, and a bracket 55 for screwing the side member 50 and a vehicle integrally fixed to the bracket 55 are fixed to a vehicle carrier. It is integrally formed with a carrier hook 56 for hanging a rope.
As an example of the conventional example in which the towing hook is mounted so as to protrude in front of the frame as described above, Japanese Utility Model Laid-Open Publication No.
The rear of No. 9066 is known.

[0003]

The above-described conventional vehicle towing hook 54 is intended to be used for towing a vehicle with a rope. Therefore, as shown in FIG. It is necessary to make the vehicle slightly protrude, and it extends horizontally in parallel with the crash portion 53 of the side member 50, and the tip of the vehicle slightly protrudes from the tip of the side member 50. In this case, the tip of the hook 54 collides with the collision target more than the tip of the side member 50 provided with the crash portion 53. In this case, if the hook 54 collides first as described above, the collision shock is almost applied to the hook 54 side, and the hook 54 has sufficient strength to pull the vehicle. There was a problem that the portion 53 was not crushed and the intended sufficient shock absorbing function could not be exhibited. Therefore, an object of the present invention is to provide a vehicle having sufficient strength not to hinder the traction of a vehicle, but to be relatively easily collapsed in a collision,
Further, it is an object of the present invention to provide a vehicle towing hook structure capable of sufficiently securing a required crash stroke (crushing length) and sufficiently exhibiting a shock absorbing function of a crash portion provided at a tip of a side member.

[0004]

According to a first aspect of the present invention, a crash portion for absorbing a shock at the time of a frontal collision is provided at a front end of a vehicle frame having a front end formed with a crash portion. In the structure of a vehicle towing hook used for towing a vehicle, a fixed portion fixed to a tip of the vehicle frame, a curved portion provided below the fixed portion and curved toward the rear of the vehicle, And a locking portion projecting toward the front of the vehicle from the portion.
In this case, in the collision, the point where the tip of the hook (the tip of the locking portion) first collides with the collision target is the same as the conventional one, but as shown in FIG. Since the position of the collision portion is lower than before by the length h in the vertical direction up to the lower end of the curved portion, the distance h × the bending moment (bending force) of the collision force is provided at the lower end of the fixed portion.
(In the conventional hook, since the distance h is almost zero, the bending force does not work and the hook does not deform as described above at the time of collision). Therefore, the shape shown in FIG. Is easily deformed as shown in FIG.
As a result, the crash portion at the tip of the side member is crushed, and its shock absorbing function is fully exhibited. According to the first aspect of the present invention, the curved portion is formed between the locking portion, which is the collision portion, and the fixed portion, and the horizontal collision force acts intensively on the curved portion. As a result, the shock absorbing function of the crash portion as described above is sufficiently exhibited. The fixing portion, the curved portion, and the locking portion in the first aspect of the invention can be symmetrical as viewed from the front of the vehicle, and can be configured substantially in a U-shape as a whole. As described above, the hook is configured to be left-right symmetrical and substantially U-shaped when viewed from the front, thereby facilitating the work of hanging the rope, and receiving the collision force on the left-right symmetrical, and thereby serving as a shock absorber itself. You can expect functionality.

According to a second aspect of the present invention, there is provided a towing hook for a vehicle, wherein a crash portion for absorbing a shock at the time of a head-on collision is provided at an end of a vehicle frame formed at the end. In the above structure, a reinforcing member for reinforcing the front end portion is integrally fixed to a front end portion of the vehicle frame, and a hook hole passing through the vehicle frame and the reinforcing member is formed. It is configured as a structure of a towing hook for a vehicle. In the above-described configuration, there is no hook provided below the side member as in the related art, and in the event of a collision, a collision force is directly applied to the tip of the side member. The shock absorption function of the part is not impaired. In this case, by attaching the reinforcing member to a position overlapping with the crush portion and forming the crush portion on the reinforcing member itself, the reinforcing member is easily crushed by a shock due to a collision,
The shock absorbing function of the crash portion is not hindered.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; The embodiments described below are examples embodying the present invention, and do not limit the technical scope of the present invention. Here, FIG. 1 is a perspective view showing a hook structure according to an embodiment of the present invention, FIG. 2 is a side view of the hook structure viewed from the side, and FIG. 3 is a modification of the embodiment shown in FIG. FIG. 4 is a side view showing a hook itself used in the embodiment, FIG. 5 is an exploded perspective view showing a state before assembling a hook structure according to another embodiment, and FIG. FIG. 7 is a perspective view showing an assembled state of the structure, and FIG.
FIG. Note that the same reference numerals are used for the same elements as those used in the prior art shown in FIG. In FIG. 1, the hook 1 is fixed to the tip 2 of the side member 50 by welding the bracket 3 to the tip 2 of the side member 50 with four screws 4. The hook 1 includes two vertical fixing portions 5 and 5 fixed to the bracket 3 by welding, hanging portions 6 and 6 hanging down from the fixing portion 5, and hanging portions 6 and 6. As shown in FIG. 2, the vehicle 1 includes curved portions 7, 7 that curve toward the rear of the vehicle from the lower end, and a U-shaped locking portion 8 that connects the curved portions 7, 7. The locking portion 8 is a portion for hooking a tip hook 9 of a tow rope shown by a two-dot chain line in FIG. 2 when the vehicle is towed. The fixing portion 5, the hanging portion 6, the curved portion 7, and the locking portion 8
Is formed in a substantially U-shape, which is symmetrical when viewed from the front of the hook 1, so that it can be easily roped during towing, deforms symmetrically in the event of a collision, and functions well as a shock absorbing material. Since the hook 1 has the hanging portion 6 and the curved portion 7 as described above, the hook 1 is easily deformed in the event of a collision of the vehicle, as described below. The collapse of the portion 53 is allowed, and the shock of the collision can be absorbed. That is, in this case, since the locking portion 8 protrudes forward of the vehicle from the front end 2 of the side member 50, when the vehicle collides head-on, the front end of the locking portion 8 of the hook 1 first collides with the collision target. . This point is the same as that of the conventional example described above, but as shown in FIG. 2, the actual length of the hanging portion 6 and the curved portion 7 is smaller than that of the conventional hook 54 shown by a two-dot chain line. (In this embodiment, the locking portion 9 and the hook 54 in the conventional example) are positioned lower than in the prior art.
A bending moment (bending force) of the distance h × collision force acts on the lower end of the fixed portion 5. On the other hand, in the conventional hook 54, since the distance h is almost zero, the bending force does not work, and it does not deform at the time of collision as described in the section of the prior art. Function is not exhibited. In this embodiment, due to the bending moment, the hook 1 having the side surface shape as shown in FIG. 4A before the collision is easily deformed as shown in FIG. As a result, the crush portion 53 at the tip of the side member 50 is crushed, and its shock absorbing function is fully exhibited. Also, a necessary crash stroke (crush length) can be sufficiently secured.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the hook 1 of the above embodiment, since there is no member for supporting the hook 1 at a portion projecting downward from the bracket 3, when the rope is pulled forward with a rope as shown in FIG. If the load on the
May bend in the direction of the rope. In order to maintain the ease of bending due to the collision of the hook 1 and avoid the bending caused by pulling with the rope as described above, an auxiliary plate 10 as shown in FIG. It is desirable to attach to the front side. In this case, even if the rope is hung on the locking portion 8 and pulled as shown in FIG. 3, the auxiliary plate 10 hits the hanging portion 6 and prevents the hanging portion 6 from bending. In other words, the hanging portion 6 is shortened, and the same effect as when the height h is shortened has the same effect. Therefore, the bending moment when the rope is pulled does not act on the hanging portion 6, and as a result, the hook 1 Will be improved. However, since the auxiliary plate 10 is merely provided along the hanging portion 6 from the fixed portion 5 and is not integrated with them, the locking portion 8 is subjected to a collision force (rearward of the vehicle). When the hook 1 acts, the hook 1 is easily deformed similarly to the embodiment shown in FIG. 2, and the shock absorbing function of the crash portion 53 is exhibited. FIG. 5 is a perspective view showing another embodiment. In this case, the U-shaped reinforcing member 11 fitted to the distal end portion 50a of the side member 50 and fitted to the distal end portion 50a to reinforce the lower surface 50b of the distal end portion 50a is integrally fixed. I have. As a fixing method, welding or screwing is possible. A vertical hook hole 12 is formed through the lower surface 50b of the distal end portion 50a of the side member 50 integrated with the lower member 50 and the lower surface of the reinforcing member 11 fitted thereto. The hook hole 12 serves as a hook for hooking the tip hook 9 of the rope as shown in FIG. In this case, the strength of the periphery of the hook hole 12 is improved by the reinforcing member 11, and the tip of the side member 50 is not deformed even if a rope is hung on the hook hole 12 and pulled. In this example, the prior art hook 54,
The hook 1 shown in the embodiment can be eliminated, so that the hook hole 1
The tip 2 of the side member 50 formed with 2 directly collides with the object. Therefore, the side member 50 tip 50
The shock absorbing function of the crush portion 53 of FIG. In order to prevent the strength of the distal end portion 50a of the side member 50 from being improved more than necessary by the reinforcing member 11, at the same place as the crash portion 53 formed at the distal end portion 50a of the side member 50 of the reinforcing member 11, A crush portion 53a projecting outward from the side member 50 is formed opposite to the crush portion on the side member 50 side, so that the reinforcing member 11 can be easily deformed by a shock due to a collision and can absorb the shock. Is desirable.

[0008]

According to the first aspect of the present invention, as described above, a crash portion for absorbing a shock at the time of a head-on collision is provided at the front end of a vehicle frame formed at the front end, and when the vehicle is towed, In the structure of the towing hook for a vehicle to be used, a fixing portion fixed to a tip of the vehicle frame,
A towing hook for a vehicle, comprising: a bent portion provided below the fixed portion and bent toward the rear of the vehicle; and a locking portion projected from the bent portion toward the front of the vehicle. It is configured as a structure. Therefore, as shown in FIG. 2, since the position of the collision portion is lower than the conventional position by the length h in the vertical direction indicated by the two-dot chain line, the bending moment (bending force) acting on the hook at the time of collision is reduced. As the size becomes smaller, the force at the time of collision concentrates on the curved portion following the fixed portion, and the curved portion is easily deformed, so that the hook is easily deformed at the time of collision. As a result, the crash portion at the tip of the side member is crushed, the shock absorbing function is fully exhibited, and the necessary crash stroke (crush length) can be sufficiently ensured. When the hook is formed in a substantially U-shape when viewed from the front, the rope is easy to hang when towing,
In addition, since it deforms symmetrically at the time of collision, good shock absorption is achieved. According to a second aspect of the present invention, there is provided a vehicle towing hook used for towing a vehicle, wherein a crash portion for absorbing a shock at the time of a frontal collision is provided at a front end of a vehicle frame formed at the front end. A vehicle, wherein a reinforcing member for reinforcing the front end portion is integrally fixed to a front end portion of the vehicle frame, and a hook hole passing through the vehicle frame and the reinforcing member is formed. Is configured as a towing hook structure, so there is no hook provided below the side member as in the past, and in the event of a collision, a collision force is directly applied to the tip of the side member. The shock absorbing function of the crash part at the tip of the member is fully exhibited. Also, in this case, the reinforcing member is mounted at a position overlapping with the crush portion, and the crush portion is also formed on the reinforcing member itself. Does not interfere with shock absorption.

[Brief description of the drawings]

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

FIG. 2 is a side view of the hook structure as viewed from the side.

FIG. 3 is a side view showing a modification of the embodiment shown in FIG. 2;

FIG. 4 is a side view showing the hook itself used in the embodiment.

FIG. 5 is an exploded perspective view showing a state before assembling a hook structure according to another embodiment.

FIG. 6 is a perspective view showing an assembled state of the hook structure.

FIG. 7 is a sectional view taken along the line BB in FIG. 6;

FIG. 8 is a perspective view showing the structure of a side member and a cross member as an example of a vehicle frame.

FIG. 9 is a side view showing a conventional hook attachment portion.

FIG. 10 is a sectional view taken along the line AA in FIG. 9;

FIG. 11 is a perspective view showing a conventional hook structure.

FIG. 12 is a perspective view showing an example of a conventional cab-over vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Hook 2 ... Tip 3 ... Bracket 4 ... Screw 5 ... Fixed part 6 ... Hanging part 7 ... Bending part 8 ... Locking part 9 ... Tip hook 10 ... Auxiliary plate 11 ... Reinforcement member 12 ... Hook hole 50 ... Side member 50a ... Tip 50b ... Lower surface 53, 53a ... Crash

Claims (4)

[Claims] A traction portion for absorbing a shock at the time of a head-on collision is provided at a tip portion of a vehicle frame formed at a tip portion, and the traction hook for a vehicle is used for towing a vehicle. A fixed portion fixed to the front end of the vehicle frame, a curved portion provided below the fixed portion and curved toward the rear of the vehicle, and a locking portion projected from the curved portion toward the front of the vehicle. A structure of a towing hook for a vehicle, characterized in that it is formed. 2. The towing hook for a vehicle according to claim 1, wherein the fixing portion, the curved portion, and the locking portion are symmetrical left and right as viewed from the front of the vehicle, and constitute a substantially U-shaped hook member as a whole. Construction. 3. A structure of a tow hook for a vehicle, wherein a crash portion for absorbing a shock at the time of a head-on collision is provided at a tip portion of a vehicle frame formed at a tip portion and used for towing a vehicle. A traction member for a vehicle, wherein a reinforcement member for reinforcing the front end portion is integrally fixed to a front end portion of a frame of the vehicle, and a hook hole passing through the frame of the vehicle and the reinforcement member is formed. Hook structure. 4. The structure of a towing hook for a vehicle according to claim 3, wherein the reinforcing member is mounted at a position overlapping the crash portion, and the crash portion is also formed on the reinforcing member.