WO2006035477A1 - Deformation preventive structure of cab - Google Patents

Abstract

A vehicle body structure of a cab of a cab over type vehicle capable of preventing the cab from being deformed so that a living space for occupants can be secured in collision. Reinforcing members (3) for preventing frame deformation are installed on cab frames (2) at positions from which buckling deformations are started. The positions from which the buckling deformations are started are bent portions (A) of the cab frames (2) in a plan view or bent portions (B) of the cab frames (2) in a side view.

Description

 Specification

 Cap deformation prevention structure

 Technical field

 TECHNICAL FIELD [0001] The present invention relates to a structure for preventing deformation of a cap for ensuring the safety of a passenger in a cab (hereinafter referred to as a “cab”) when a cap-over-type commercial vehicle collides. In particular, the present invention relates to a structure for preventing deformation of a cap that makes it easy to maintain a passenger's living space by a structure of a cap frame extending in the front-rear direction on the floor of the cap.

 Background art

 [0002] In a cab-over-type commercial vehicle, because the cab is in the forefront, it is necessary to secure a living space for the safety of passengers if a collision occurs and the cab is deformed.

 [0003] FIG. 1 shows an example of a cap portion of a cab over type track. A cap 1 is mounted on the front end of the chassis frame F, and two cap frames 2 extending in the front-rear direction are provided below the floor of the cap 1. A hinge portion (not shown) is provided at the front portion of the cap frame 2 and supported by the chassis frame F, and a tilt composed of a hydraulic cylinder piston is provided between the chassis frame F and the cap frame 2. Means 5 is interposed, and is configured to rotate about the hinge portion to tilt up the cap 1 by its operation.

 [0004] The side surface of the cap frame 2 is bent at the rear half as shown in Fig. 1 to support the cap floor surface in a kicked-up shape. In addition, as shown in FIG. 2, the planar shape of the two cap frames 2 and 2 is also inflected by a narrow spacing force parallel to each other at the front, and becomes parallel at a wide spacing at the rear. And

 [0005] In the case of the cab 1 configured in this manner, when the head 1 collides with the wall surface W, the cab 1 has a wall W and an advanced carrier end B1 as shown by a chain line in FIG. It is crushed by being pinched. Then, the cap frame 2 is buckled and deformed as indicated by a broken line E in the figure, and the living space of the driver D is reduced.

[0006] As a conventional technique for dealing with such problems, it is attached to a cap frame. A technology has been proposed in which a member attached to an engine is engaged with the member and the cap frame is supported by the rigidity of the engine to prevent deformation of the cap (see Patent Document 1).

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 Patent Document 1: JP-A-6-115463

 [0007] As a result of various studies conducted by the present inventor to deal with the above problems, the cross-sectional shape of the cap frame 2 has an inverted hat shape as shown in FIG. When the opening end force is also in the shape of a flange extending outward in the horizontal direction, the deformation of the cap 1 due to the frontal collision will be parallel to the vertical sides of the reverse hat cross section at the inflection point of the cap frame 2. As shown in Fig. 4, the surfaces 2s and 2s were bent inward and buckled, and it was found that the bending of the longitudinal direction of the cap frame 2 occurred from that point. It was found that the buckling strength of the cap frame 2 is increased by reinforcing the cross-sectional shape so as to prevent the side surfaces 2s and 2s from bending inward.

 [0008] Therefore, by applying this technology, we have devised and proposed a method that makes it easier to maintain the occupant's living space by optimizing the strength distribution of the cab frame 2 and constructing it so that the area other than the occupant's occupant space is crushed. It came to do.

 Disclosure of the invention

 Problems to be solved by the invention

[0009] The present invention has been proposed based on the above findings in order to cope with the above-mentioned problems, and prevents deformation of the cap of a over-cab vehicle in which deformation is prevented so that the occupant's living space is easily maintained in the event of a collision. For the purpose of providing structure!

 Means for solving the problem

[0010] The deformation preventing structure of the cap (1) of the present invention is provided with the frame deformation preventing reinforcing material (3) at the position where the buckling deformation of the cap frame (2) is started, and the buckling deformation. The starting point of this is the part (A) where the curve shape is changed to the flat shape of the cap frame (2), or is the position (A) where the curve shape is changed to the side shape of the cap frame (2). (B)) (Claim 1).

[0011] In the present invention, the portion where the frame deformation preventing reinforcing material is provided is in the vicinity of the portion (C) where the cap frame (2) and the tilting means (5) are connected. (Claim 2) [0012] By providing the frame deformation preventing reinforcement in the vicinity of the buckling deformation starting point of the cap frame or the connecting part of the tilt means in this way, the buckling deformation strength of the cap frame at the time of collision is increased. By strengthening the vicinity of the driver's seat compared to the end, even if the cap is deformed, the occupant's living space is maintained and safety is immediately increased.

 As a more specific form of the frame deformation preventing reinforcing material, the following configuration is desirable.

 [0013] The cap frame (2) has an inverted hat shape whose cross-sectional shape is open upward, and the frame deformation prevention reinforcing material (3A) is formed by connecting between both side surfaces (2s, 2s) of the frame. (Claim 3).

 Alternatively, the frame deformation preventing reinforcing material (3B) is formed in a pipe shape by connecting the side surfaces (2s, 2s) of the frame (claim 4).

 Alternatively, the frame deformation preventing reinforcing material (3C) is formed in a plate shape by connecting the side surfaces (2s, 2s) of the frame (claim 5).

[0014] In the present invention, the cap frame (2) has an inverted hat shape whose cross-sectional shape opens upward, and the frame deformation preventing reinforcing material (3D) is an inverted hat of the cap frame (2). The part (3c) that is inserted into the inside of the cross section and extends horizontally is (

2) Formed to prevent deformation (claim 6).

[0015] According to the configuration described above, both side surfaces of the cap frame having the inverted hat-shaped cross section are connected to prevent inward buckling, and the deformation buckling strength can be increased.

 Therefore, it can be applied to the invention according to claim 1 to improve safety, or can be applied to the invention according to claim 2 to deal with problems associated with the attachment of the tilt means. The invention's effect

[0016] According to the present invention, the following operational effects can be obtained.

 (1) When the reinforcing member according to the present invention is provided in the cap frame, even if the cross section is easy to manufacture, the both side surfaces are connected to prevent inward buckling, and the strength does not become a closed cross section. It can be secured.

(2) In particular, increase the strength of the cap frame at the driver's seat, By deforming, it becomes easier to maintain the occupant's living space in the event of a collision.

 (3) Further, it is possible to prevent damage to the coupling portion between the cap frame and the floor surface.

 BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

 In the first embodiment, the cap frame 2 has the side shape and the planar shape described in FIGS. 1 and 2, and is formed by forming a steel plate. As shown in Fig. 3, the basic cross-sectional shape is an inverted-hat shape, that is, a U-shape with an upper opening at both side surfaces 2s, 2s and bottom surface 2b, which are almost vertically parallel (may have draft angle). It has a shape, and the flange surfaces 2f and 2f extend in both horizontal directions from the opening end.

 [0018] In addition, it is a place that is inflected in the planar shape (“A” in FIG. 1), which is the position from which the buckle deformation of the cap frame 2 starts, and a place that is also bent in the side shape ("B" in Fig. 2) is provided with a reinforcing material 3A (hereinafter, the reinforcing material is represented by reference numeral 3).

 Then, the reinforcing material 3A, as shown in FIG. 5 and FIG.

It is inserted between 2s, formed into a rib shape with a hat-shaped cross section as shown in the figure, and both ends thereof are fixed to the 2s and 2s surfaces.

Next, in the second embodiment of the reinforcing material shown in FIG. 7 and FIG. 8, it is provided at the same position as in the first embodiment, and a pipe-like shape is provided between the both side surfaces 2s, 2s of the cap frame. Reinforcement 3

B is inserted and both ends are fixed. The cross-section of the pipe-shaped reinforcing material 3B may be either a circular shape or a square shape.

[0020] Further, in the third embodiment of the reinforcing material shown in FIGS. 9 and 10, a plate-shaped reinforcing material 3C is provided between the both side surfaces 2s, 2s of the cap frame, provided at the same position as in the above-described embodiment. Linked.

 In addition, it is not limited to the flat plate as shown in the figure, and may be formed of I-shaped steel or L-shaped steel.

[0021] The fourth embodiment is a reinforcing material 3D made of a steel sheet molded product that is inserted between both side surfaces 2s, 2s of the cap frame 2 as shown in FIGS. As shown in the cross-sectional view of Fig. 12, the shape is one side down from the frame flange 2f along the inside of the frame side surface 2s. Force S is superimposed (3a-3b) and extends horizontally between both sides of the frame (3c)

Further, it is formed so as to be fixed (3d) along the inner side of the opposite frame side surface 2s to prevent the deformation of the frame 2 !.

[0022] In this way, the closed cross section is formed by the combination of the cap frame 2 having the open cross section and the reinforcing material 3D, and the torsional strength can be increased. Therefore, in addition to the same effects as the above-described embodiment, it is possible to eliminate the problem that the coupling (for example, spot welding) with the floor surface (not shown) is separated by the torsional bending load.

In the above-described embodiments, the buckling deformation starting points A and B of the cap frame 2 are in the vicinity of the connecting part of the tilting means 5 and the connecting part C of the force tilting means is separated from the buckling starting point. In the case of such a configuration, by providing any of these reinforcing members 3 in the vicinity of the connecting portion C of the tilt means 5, local stress concentration due to the load accompanying the attachment of the tilt means 5 or the tilt operation, etc. It can deal with.

 Brief Description of Drawings

[0024] FIG. 1 is a side view showing a cap and a cap frame.

 FIG. 2 is a diagram showing a planar shape of the cap frame of FIG.

 FIG. 3 is a diagram showing a cross-sectional shape of the cap frame of FIG.

 4 is a view showing a buckled state of the cross section of the cap frame shown in FIG.

 FIG. 5 is a diagram showing a cross-sectional shape of a first embodiment of a cap frame reinforcing material according to the present invention.

 FIG. 6 is a cross-sectional view along the line aa in FIG.

 FIG. 7 is a view showing a cross-sectional shape of a second embodiment of a cap frame reinforcing material according to the present invention.

 FIG. 8 is a bb cross-sectional view of FIG.

 FIG. 9 is a diagram showing a cross-sectional shape of a third embodiment of a cap frame reinforcing material according to the present invention.

 FIG. 10 is a sectional view taken along line c c in FIG.

 FIG. 11 is a perspective view showing a fourth embodiment of a cap frame reinforcing material according to the present invention.

 FIG. 12 is a cross-sectional view in the direction perpendicular to the frame of FIG.

 Explanation of symbols

[0025] 1 · · · Cap

2 · · · Cap frame , 3 A— 3D ··· Reinforcement ··· Tilt means

Claims

The scope of the claims  [1] A reinforcement for preventing frame deformation is provided at the location where the buckle deformation of the cap frame starts, and the location where the buckling deformation starts is the location where the planar shape of the cap frame is deformed. A structure for preventing deformation of a cap, characterized in that it is a portion that is inflected in the side shape of the cap frame.  2. The structure for preventing deformation of a cap according to claim 1, wherein the reinforcing member for preventing deformation of the frame is provided in the vicinity of a position where the cap frame and the tilt means are connected. 3. The cap frame has an inverted hat shape whose cross-sectional shape is open upward, and the frame deformation prevention reinforcing member is formed in a rib shape by connecting both side surfaces of the frame. The deformation prevention structure of the kayab. [4] The cap frame has an inverted hat shape whose cross-sectional shape is open upward, and the frame deformation preventing reinforcing member is formed in a pipe shape by connecting both side surfaces of the frame. Any cap deformation prevention structure. 5. The cap frame has an inverted hat shape whose cross-sectional shape is open upward, and the frame deformation preventing reinforcing member is formed in a plate shape by connecting both side surfaces of the frame. The deformation prevention structure of the kayab. [6] The cap frame has an inverted hat shape whose cross-sectional shape is open upward, and the frame deformation preventing reinforcing material is inserted into the inside of the inverted hat-shaped cross section of the cap frame and extends in the horizontal direction. The structure for preventing deformation of a cap according to any one of claims 1 and 2, wherein the material portion is formed so as to prevent deformation of the frame.