JP2005119406A - Towing hook mounting part structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a towing hook mounting part structure so as to prevent impact load from directly transmitting from a beam member to a frame member. <P>SOLUTION: In the towing hook mounting part structure, a joint member 11 having a hollow closed sectional shape is mounted to a side frame 13 provided along the towing direction through bolts 19 passing through the joint member 11, and the towing hook 4 is mounted to the joint member 11 through the bolts 19. The axis line C1 of the bolts 19 is different from the axis line C2 of the towing hook 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a tow hook mounting portion structure used in a vehicle.

Some vehicles such as automobiles have traction hooks attached to the front end and the rear end of the vehicle. Since a traction load is applied to the attachment portion of the traction hook, various structures have been proposed for this attachment portion. For example, a structure in which a traction hook is attached to a frame member of a vehicle body provided along a traction direction by a bolt penetrating a beam member having a hollow cross-sectional shape via the beam member is known (for example, see Patent Document 1). ).
Japanese Utility Model Publication No. 4-39911

  However, in the above prior art, the traction load can be received by the frame member of the vehicle body, which is advantageous in terms of strength and rigidity, and the traction strength can be increased by the bolt, but the impact load acting on the beam member is directly applied to the frame member. There is a problem of being transmitted.

  Accordingly, the present invention provides a tow hook mounting portion structure in which an impact load is not directly transmitted from a beam member to a frame member.

In order to achieve the above object, the invention described in claim 1 is directed to a frame member (for example, the side frame 13 in the embodiment) provided along the traction direction, and a beam member (for example, a hollow closed cross-sectional shape). The joint member 11 in the embodiment is attached via a fastening member (for example, the bolt 19 in the embodiment) penetrating the beam member, and a traction hook (for example, the traction hook in the embodiment) is attached to the beam member via the fastening member. 4) A tow hook mounting portion structure for mounting, wherein the axis of the fastening member (for example, the axis C1 in the embodiment) is different from the axis of the tow hook (for example, the axis C2 in the embodiment). .
With this configuration, when a traction load acts on the traction hook, this load is transmitted from the traction hook to the frame member via the beam member that is the vehicle body frame member, and to the frame via the fastening member at a position different from the axis of the traction hook. Is transmitted to the member.

According to a second aspect of the present invention, the fastening member is connected to the traction hook or the frame member by a mounting bracket (for example, the bumper beam bracket 15 and the side frame bracket 16 in the embodiment) provided outside the beam member. It is characterized by being.
By comprising in this way, a fastening member can be connected to a pulling hook or a frame member by interposing a mounting bracket.

The invention described in claim 3 is characterized in that the mounting bracket is provided outside a hollow frame member.
By comprising in this way, a mounting bracket can be attached from the outer side of a frame member, and when a shock load acts, it can avoid that a frame member prevents a deformation | transformation of a mounting bracket.

The invention described in claim 4 is characterized in that the fastening member is attached via a bulkhead (for example, bulkhead 17 in the embodiment) provided in a hollow cross section of the beam member.
By comprising in this way, it becomes possible to raise the attachment strength of a fastening member, raising the intensity | strength of beam member itself.

The invention described in claim 5 is characterized in that a collar (for example, the collar 24 in the embodiment) is provided around the fastening member.
By comprising in this way, it can oppose the force of the collapsing direction of a beam member.

  According to the first aspect of the present invention, there is an effect that a structure capable of sufficiently receiving a large traction load and avoiding an impact load from being directly transmitted can be obtained.

  According to the second aspect of the present invention, there is an effect that a simple and easy structure can be obtained by the mounting bracket.

  According to the third aspect of the present invention, there is an effect that it is easy to mount, and the degree of freedom of deformation of the mounting bracket can be secured to absorb the shock.

  According to the fourth aspect of the present invention, there is an effect that the mounting strength of the fastening member can be increased and the traction force can be reliably received.

  According to the fifth aspect of the present invention, there is an effect that it is possible to more reliably receive the traction force.

An embodiment of the present invention will be described with reference to the drawings. In the following description, Rr indicates the rear side, and OUT indicates the outside of the passenger compartment.
As shown in FIG. 1, a tailgate 3 is provided in a rear opening 2 provided at the rear of the vehicle body 1 so as to be openable and closable, and a mounting portion for a traction hook 4 described later is provided below the rear opening 2. Yes.
Specifically, an opening 8 is formed in a part of the bumper face 7 of the rear bumper 6, and the opening 8 is closed with a lid 9. Then, with the lid 9 opened, the traction hook 4 is screwed and fixed to a socket nut 5 that protrudes rearward inside the bumper face 7.

FIG. 2 is a perspective view of the lower part of the rear part of the vehicle body as viewed from the driver's seat side. In the drawing, a rear pillar 12 is connected to a rear panel 10 constituting the lower side of the rear opening 2 via a joint member 11. The rear panel 10, the joint member 11, and the rear pillar 12 are all members having a hollow cross-sectional shape and form a vehicle body skeleton portion, so that the strength rigidity of the rear portion of the vehicle body including the support rigidity of the tailgate 3 can be secured. A rear end portion of a side frame 13 provided along the vehicle body longitudinal direction is connected to the joint member 11 from the front side.
The side frame 13 has a hat-shaped cross-sectional shape, and is connected to the lower surface of the rear floor 14 to form a vehicle body skeleton portion having a hollow cross-sectional shape along the longitudinal direction of the vehicle body below the rear floor 14.

  3 is a perspective view of the rear portion of the vehicle body as viewed obliquely from the left side, and FIG. 4 is a side view of FIG. As shown in FIGS. 3 and 4, a bumper beam bracket 15 is attached to the rear wall of the rear panel 10. The socket nut 5 is attached to the upper wall 15a of the bumper beam bracket 15, and the traction hook 4 is screwed and fixed to the socket nut 5. Here, the bumper beam bracket 15 is attached to a position slightly offset downward in the vertical direction with respect to the attachment portion of the side frame 13 to the rear panel 10.

  Specifically, the attachment portion structure of the pulling hook 4 will be described with reference to FIG. In the figure, the hat-shaped side frame 13 having the cross-sectional shape described above is a member provided along the traction direction, that is, the longitudinal direction of the vehicle body. Is formed. A piece 16a of the side frame bracket 16 having an L-shaped cross section is welded to the rear side walls 13a, 13a of the side frame 13, and the other piece 16b of the side frame bracket 16 is a front wall of the joint member 11 having a hollow cross section. 11a is polymerized.

Inside the joint member 11, a bulkhead 17 having a hat-shaped cross-sectional structure with a front side opened on the back side of the attachment portion of the side frame 13 is provided. Flange portions 18 are formed on both sides of the bulkhead 17, and the flange portions 18 are overlapped from the inside on the front wall 11a of the joint member 11 where the side frame bracket 16 is overlapped.
The upper wall 17a of the bulkhead 17 is disposed in close contact with the inner surface of the rear wall 11b of the joint member 11 so as to cover the side frame 13 and prevent the deformation of the joint member 11 between bolts 19 described later. ing.

  The joint member 11 configured as described above is provided at four locations in the front-rear direction, that is, by four bolts 19 and nuts 19 ′ penetrating the other pieces 16b of the side frame brackets 16 and the flange portions 18 of the bulkhead 17. The joint member 11 and the side frame 13 are fastened and fixed via a collar 24 described later via the side frame bracket 16. Therefore, the bolt 19 is connected to the side frame 13 by the side frame bracket 16 provided outside the joint member 11.

  Here, the bumper beam bracket 15 attached to the rear wall of the rear panel 10 from the outside is a box-shaped member whose front side is open, and a flange portion 20 is formed around it, and upper portions of the left and right flange portions 20 are formed. The upper two bolts 19 and 19 are aligned with the mounting positions of the upper and lower left and right flange portions 20, and the vertical center portions thereof are aligned with the lower two bolts 19 and 19 mounting positions. The flange portion 20 is fastened and fixed to the joint member 11 by the bolt 19 and the nut 19 '.

FIG. 6 shows how the collar 24 arranged around the bolt 19 is attached. When the joint member 11 is fastened and fixed by the bolt 19, a collar 24 is provided around the bolt 19 in order to prevent the joint member 11 from being crushed. Two collars 24 are arranged on both side walls 17b of the bulkhead 17 and are attached to the outside of the bolts 19 and 19 as a pair.
The collar 24 includes a base portion 25 that is in close contact with the side wall 17b of the bulkhead 17, and upper and lower cylindrical portions 26 that are formed so as to be wound inwardly so that an upper edge and a lower edge form an arc. The rear edge is provided with a mounting portion 27 that bends toward the upper wall 17a of the bulkhead 17. By welding this attachment portion 27 to the upper wall 17a of the bulkhead 17 by spot welding or the like, the two collars 24 are arranged on the side wall 17b of the bulkhead 17.

  Accordingly, the flange portion 20 of the bumper beam bracket 15, the joint member 11, and the other piece 16 b of the side frame bracket 16 are joined to the joint member 11 via the collar 24 by the bolt 19 and the nut 19 ′ together with the flange portion 18 of the bulkhead 17. Tightened and fixed.

A hole 22 formed through the reinforcing reinforcement 21 is provided at a substantially central portion of the upper wall 15a of the bumper beam bracket 15. A socket nut 5 having a female screw 23 is provided in the hole 22. The tow hook 4 is detachably screwed and fixed to the female screw portion 23 through the hole 22 of the bumper face 7 by being inserted through the retaining portion 24 and welded. . Therefore, the bolt 19 is connected to the pulling hook 4 by the bumper beam bracket 15 provided outside the joint member 11.
In this way, the pulling hook 4 is attached to the substantially central portion of the upper wall 15a of the bumper beam bracket 15, and the mounting position of the bolt 19 is set on the flange portion 20 around the bumper beam bracket 15. The axis C1 is set at a position different from the axis C2 of the tow hook 4.

  Therefore, according to this embodiment, when a traction load acts on the traction hook 4, this load acts in a state where the load is shared by the bolts 19 from the flange portion 20 of the bumper beam bracket 15. It acts on the side frame 13 through the side frame bracket 16 from the joint member 11 with increased height. As a result, a large traction load can be received sufficiently. In particular, since the rear pillar 12, the rear panel 10, and the side frame 13 are connected to the joint member 11, the joint member 11 is advantageous in that it has a sufficient strength and rigidity that can withstand a traction load.

  Further, when an impact load is applied to the rear portion of the vehicle from the rear side with the traction hook 4 attached, this load is input along the axis C2 of the traction hook 4, and this load is applied to the bumper beam bracket 15. And is indirectly transmitted to the bolt 19 having the axis C1 at a position different from the traction hook 4 through the bumper beam bracket 15 and further from the bolt 19 to the side through the side frame bracket 16. It is transmitted to the frame 13. Therefore, it is possible to sufficiently receive a large traction load and to prevent the impact load from being directly transmitted.

  Further, since the bolt 19 is connected to the traction hook 4 by the bumper beam bracket 15 provided outside the joint member 11 and is connected to the side frame 13 by the side frame bracket 16, the bumper beam bracket 15 and the side frame are connected. By interposing the bracket 16, a simple and easy mounting structure can be obtained.

  Since the bumper beam bracket 15 and the side frame bracket 16 are provided outside the side frame 13, the bumper beam bracket 15 and the side frame bracket 16 can be easily attached, and an impact load is applied. In this case, the side frame 13 can be prevented from obstructing the deformation of the bumper beam bracket 15 and the side frame bracket 16. Therefore, there is an advantage that the mounting workability can be improved and the bumper beam bracket 15 and the side frame bracket 16 can secure the degree of freedom of deformation and absorb the shock.

Further, since the bulkhead 17 is provided on the joint member 11 provided with the bolts 19, it is possible to increase the mounting strength of the bolts 19 while increasing the strength of the joint member 11 itself. You can catch it. Here, since the collar 24 is externally mounted on the bolt 11, it is possible to resist the force in the crushing direction of the joint member 11 and to receive the traction force more reliably.
The present invention is not limited to the above-described embodiment. For example, the present invention has been described by taking the tow hook at the rear of the vehicle body as an example.

  The present invention is applicable to a collision safety technique for a vehicle having a tow hook.

1 is a perspective view of a vehicle. It is the perspective view which looked at the lower part of the vehicle body rear part from the driver's seat side. It is the perspective view which looked at the vehicle body rear part from the diagonal left side. FIG. 4 is a side view of FIG. 3. FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. It is a perspective view of a bulkhead and a collar.

Explanation of symbols

4 Tow hook 11 Joint member (beam member)
13 Side frame (frame member)
15 Bumper beam bracket (mounting bracket)
16 Side frame bracket (mounting bracket)
17 Bulkhead 19 Bolt (fastening member)
24 Color C1, C2 axis

Claims (5)

  A traction hook is attached to a frame member provided along the traction direction through a fastening member that penetrates the beam member, and a traction hook is attached to the beam member through the fastening member. A traction hook attachment part structure, wherein the axis of the fastening member is different from the axis of the traction hook.   The tow hook mounting portion structure according to claim 1, wherein the fastening member is connected to the tow hook or the frame member by a mounting bracket provided outside the beam member.   The tow hook mounting portion structure according to claim 2, wherein the mounting bracket is provided outside a hollow frame member.   The traction hook attachment part structure according to any one of claims 1 to 3, wherein the fastening member is attached via a bulkhead provided in a hollow section of the beam member.   The tow hook attaching part structure according to any one of claims 1 to 4, wherein a collar is provided around the fastening member.

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