JP5437140B2 - Reinforcement structure for body frame members - Google Patents

Description

  The present invention relates to a reinforcing structure for a vehicle body skeleton member.

  2. Description of the Related Art As a vehicle body skeleton member, an inverted hat-shaped member having flanges at both ends of a U-shaped concave portion has been conventionally used. Various configurations have been proposed for the reinforcing structure of the inverted hat-shaped member (see, for example, Patent Document 1).

  FIG. 6 shows a conventional example (1) of a reinforcing structure for a vehicle body skeleton member. In the configuration of the conventional example (1), a reverse hat-shaped reinforcing member having a recessed portion formed with a shallow depth is assembled to the reverse hat-shaped vehicle body skeleton member. Further, in the configuration of the conventional example (1), the reinforcing members are arranged so as to overlap along the extending direction (x direction) of the vehicle body skeleton member. The reinforcing member is fixed to the flange of the vehicle body skeleton member by welding.

  FIG. 7 shows a conventional example (2) of a reinforcing structure for a vehicle body skeleton member. In the configuration of the conventional example (2), the reinforcing member is assembled by welding to the concave portion of the inverted hat-shaped body frame member. The reinforcing member of the conventional example (2) has a main body portion corresponding to the shape of the concave portion of the vehicle body skeleton member, and a flange erected so as to surround the main body portion. In the configuration of the conventional example (2), the reinforcing member is arranged in the direction (y direction) intersecting the extending direction (x direction) of the vehicle body skeleton member inside the recess of the vehicle body skeleton member.

JP-A-7-2033

  In the configuration of the conventional example (1), since the reinforcing member is disposed in the same direction as the extending direction of the vehicle body skeleton member, the effect of reinforcement by the reinforcing member is relatively small. Further, in the configuration of the above conventional example (2), the welded portions of the reinforcing member are concentrated inside the concave portion of the vehicle body skeleton member. Therefore, in the above conventional example (2), there is room for improvement in that the workability at the time of assembling is lowered and it is difficult to obtain the work accuracy.

  In view of the above circumstances, there is provided a reinforcing structure for a vehicle body frame member that can more effectively reinforce the vehicle body frame member and that is relatively easy to assemble.

Reinforcing structure of a vehicle body framework member of one embodiment includes a body frame member cross-section in the reverse-hat shape is formed with respective flanges at both ends of the U-shaped cross section, the both ends of the U-shaped cross section flanges A cross section formed in an inverted hat shape, and a reinforcing member disposed in a U-shaped cross section of the vehicle body skeleton member. The reinforcing member is disposed so that the height from the flange to the bottom surface of the U-shaped cross-section portion is the same as that of the vehicle body skeleton member and extends in a direction intersecting with the extending direction of the vehicle body skeleton member. In one embodiment, with contacting the bottom surface of the U-shaped cross section of the bottom surface and the vehicle body frame member of U-shaped cross section of the reinforcing member is fixed, so span the flange of the reinforcing member to the flange of the vehicle body frame member Fix it in the state.

In the one aspect described above, the flange of the vehicle body skeleton member may be fixed to each flange of the reinforcing member by welding. Further, the bottom surface of the U-shaped cross-section portion of the vehicle body skeleton member may be fixed to the bottom surface of the U-shaped cross-section portion of the reinforcing member using a bolt. At this time, other vehicle body parts may be fixed to the bottom surface of the U-shaped cross-section portion of the vehicle body skeleton member together with the reinforcing member using bolts.

  According to the reinforcing structure for a vehicle body skeleton member of one aspect, the vehicle body skeleton member can be effectively reinforced, and the assembling operation is relatively easy.

The perspective view which shows the structural example of the front member of this embodiment. The top view which shows the structural example of the front member of this embodiment Front view showing a configuration example of a front member of the present embodiment Side view showing a configuration example of a front member of the present embodiment The figure which shows the example of arrangement | positioning of the front member of this embodiment The perspective view which shows the prior art example (1) of the reinforcement structure of a vehicle body frame member The perspective view which shows the prior art example (2) of the reinforcement structure of a vehicle body frame member

  Hereinafter, the structural example of the reinforcement structure of the vehicle body frame member in this embodiment is demonstrated. The vehicle body skeleton member in the present embodiment is the front member 1 used for the framework of the cab 10 of the cab over type vehicle (see FIG. 5). The front member 1 is disposed so as to extend in the horizontal direction in front of the vehicle. Also, for example, two hooks 2 for locking a front lid (not shown) are fixed on the front side of the vehicle of the front member 1.

  1 to 4 show a configuration example of the front member 1 of the present embodiment. The front member 1 of the present embodiment is a member having a cross-sectionally inverted hat shape. That is, in the front member 1, the opposing wall part 1b which mutually opposes, and the bottom wall part 1a which connects the end of an opposing wall part have comprised the recessed part with a U-shaped cross section. In addition, a flange 1c is connected to the other end of the facing wall portion 1b of the front member 1. Moreover, in the front member 1, the bottom wall part 1a which makes a recessed part bottom face, and each flange 1c are substantially parallel. A bolt hole 1 d is opened in the bottom wall portion 1 a of the front member 1. Further, as shown in FIG. 5, in the assembled state of the vehicle, the front member 1 is arranged so that the bottom surface of the recess faces the front side of the vehicle.

  In the recess of the front member 1, the reinforcing member 3 is disposed at the position of the bolt hole 1 d of the front member 1. Similar to the front member 1, the reinforcing member 3 is a member having an inverted hat cross section, and is disposed so as to extend in a direction (y direction) substantially orthogonal to the extending direction (x direction) of the front member 1. The front member 1 and the reinforcing member 3 are made of, for example, a high-tensile steel plate.

  Here, the depth (the length in the y direction) of the opposing wall portion 3b and the bottom wall portion 3a of the reinforcing member 3 is larger than the width of the concave portion of the front member 1 so as not to interfere with the opposing wall portion 1b of the front member 1. It is slightly smaller. Further, the height (the length in the z direction) of the opposing wall portion 3 b in the reinforcing member 3 substantially matches the height of the opposing wall portion 1 b of the front member 1. Therefore, when the reinforcing member 3 is disposed in the recess of the front member 1, the bottom surface of the recess of the reinforcing member 3 comes into contact with the bottom surface of the recess of the front member 1. Furthermore, the width of the bottom wall portion 3a of the reinforcing member 3 (the length of the bottom wall portion 3a in the x direction) is larger than the width of the bottom wall portion 1a of the front member 1 (the length of the bottom wall portion 1a in the y direction). It is narrower. A bolt hole 3 d corresponding to the bolt hole 1 d of the front member 1 is opened in the bottom wall portion 3 a of the reinforcing member 3.

  Further, the depth (length in the y direction) of the flange 3 c of the reinforcing member 3 is substantially the same size as the width of the front member 1. Therefore, when the reinforcing member 3 is disposed in the recess of the front member 1, the flanges 3c on both sides of the reinforcing member 3 are in a state of straddling the flanges 1c of the front member 1, respectively. The flange 3c of the reinforcing member 3 is fixed to the flange 1c of the front member 1 by spot welding. In addition, about one reinforcing member 3, the spot welding location with the front member 1 is four places.

  On the other hand, the bottom wall portion 3a of the reinforcing member 3 and the bottom wall portion 1a of the front member 1 are fixed by a bolt 4 inserted through the bolt holes (1d, 3d) and a nut 5 screwed into the bolt 4. At this time, the hook 2 of the front lid may be disposed on the vehicle front side of the front member 1, and the hook 2 may be fixed to the front member 1 using the bolt 4 and the nut 5 described above.

  Hereinafter, operational effects of the configuration example of the present embodiment will be described. In the recess of the front member 1 of the present embodiment, a reinforcing member 3 having a reverse hat shape in cross section is fixed in a direction (y direction) substantially orthogonal to the extending direction (x direction) of the front member 1. Further, the bottom surface of the concave portion of the reinforcing member 3 and the bottom surface of the concave portion of the front member 1 are fixed in contact with each other, and the flange 3 c of the reinforcing member 3 is fixed in a state of straddling the flanges 1 c of the front member 1. As a result, the front member 1 of the present embodiment is reinforced by the two opposing wall portions in a direction substantially perpendicular to the extending direction of the front member 1 for each reinforcing member 3. It can be raised enough.

  In the present embodiment, when the reinforcing member 3 is disposed in the concave portion of the front member 1, the flange and the bottom surface of the concave portion of the reinforcing member 3 are in contact with the front member 1. Thereby, positioning when fixing the reinforcing member 3 is facilitated, and workability and assembly accuracy during assembly can be increased.

  In the present embodiment, the flange 3 c of the reinforcing member 3 is fixed to the flange 1 c of the front member 1 by welding, and the bottom surface of the recessed portion of the reinforcing member 3 and the bottom surface of the recessed portion of the front member 1 are fixed by the bolts 4. As a result, there is no welded portion inside the recess of the front member 1, so that the work of attaching the reinforcing member 3 to the front member 1 becomes very easy. Moreover, in this embodiment, it is also easy to omit the subassembly process for attaching the reinforcing member 3 to the front member 1 in the vehicle assembly process.

  Moreover, in this embodiment, the hook 2 of the front lid is fixed to the attachment position of the reinforcing member 3 in the front member 1. The hanging tool 2 attached to the front member 1 is subjected to a force from the front of the vehicle by opening and closing the front lid. The front member 1 is attached at the bottom wall portions (1a, 3a) of the front member 1 and the reinforcing member 3. ) Are overlapped, the hook 2 is sufficiently reinforced. Moreover, in this embodiment, since the reinforcement member 3 and the hanging tool 2 are fastened with the common bolt 4, the fastening point of the front member 1 can be decreased, and the workability | operativity at the time of an assembly can be improved further.

<Supplementary items of the embodiment>
In the above-described embodiment, the application example to the front member 1 of the vehicle has been described as an example of the reinforcing structure of the vehicle body skeleton member. However, it goes without saying that the present invention is not limited to the front member 1 and can be applied to other vehicle body skeleton members. The vehicle body part attached to the vehicle body skeleton member may be other than the hook 2 of the front lid. Moreover, the welding method of the front member 1 and the reinforcing member 3 is not limited to spot welding.

  From the above detailed description, features and advantages of the embodiments will become apparent. It is intended that the scope of the claims extend to the features and advantages of the embodiments as described above without departing from the spirit and scope of the right. Further, any person having ordinary knowledge in the technical field should be able to easily come up with any improvements and modifications, and there is no intention to limit the scope of the embodiments having the invention to those described above. It is also possible to use appropriate improvements and equivalents within the scope disclosed in.

DESCRIPTION OF SYMBOLS 1 ... Front member, 2 ... Hanging tool, 3 ... Reinforcement member, 4 ... Bolt, 5 ... Nut, 10 ... Driver's cab, 1a, 3a ... Bottom wall part, 1b, 3b ... Opposite wall part, 1c, 3c ... Flange, 1d, 3d ... bolt holes

Claims (3)

A vehicle body skeleton member having a cross section formed in an inverted hat shape having flanges at both ends of the U-shaped cross section,
A cross section is formed in an inverted hat shape having flanges at both ends of the U-shaped cross-section portion , and a reinforcing member disposed in the U-shaped cross-section portion of the vehicle body skeleton member,
The reinforcing member has a height from the flange to the bottom surface of the U-shaped cross section is the same as the car body frame member, and is disposed to extend in a direction intersecting the extending direction of the vehicle body frame member,
Is fixed by contacting the bottom surface of the U-shaped cross section of the bottom surface and the vehicle body frame member of U-shaped cross section of the reinforcing member, were span the flange of the reinforcing member to the flange of the vehicle body frame member A reinforcing structure for a vehicle body skeleton member, which is fixed in a state. The vehicle body skeleton member reinforcing structure according to claim 1,
The flange of the vehicle body skeleton member is fixed to each flange of the reinforcing member by welding,
A reinforcing structure for a vehicle body skeleton member, wherein the bottom surface of the U-shaped cross-sectional portion of the vehicle body skeleton member is fixed to the bottom surface of the U-shaped cross-sectional portion of the reinforcing member using a bolt. The reinforcing structure for a vehicle body skeleton member according to claim 2,
A reinforcing structure for a vehicle body skeleton member, wherein other vehicle body parts are fixed together with the reinforcing member to the bottom surface of the U-shaped cross-section portion of the vehicle body skeleton member using the bolts.

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