JP4974338B2 - Cross member of truck frame - Google Patents

Description

  The present invention relates to an improvement in a cross member of a truck vehicle frame.

  As shown in FIG. 8, the cross member 2 of the truck-like ladder frame 3 assembled by fastening the cross member 2 to the side members 1 and 1 ′ with rivets and bolts as shown in FIG. Although obtained by integral molding, the width of the upper and lower flanges 4, 4 'is generally larger than the center in order to secure the fastening strength and rigidity with the side members 1, 1'. Is.

  In this case, since the bent line that is the joint between the upper and lower flanges 4 and 4 'and the web 5 connecting the upper and lower flanges 4 and 4' is usually a straight line, the flange end faces parallel to the bent line are bent at both ends of the flanges 4 and 4 '. The width of both ends of the flange is increased by bending.

  For this reason, in the cross member 2 shown in FIG. 8, the developed width is also increased at the left and right end portions of the flat plate W as compared with the central portion, as shown in FIG. As a result, the product yield decreases and the material cost increases.

  As means for solving this, as shown in Japanese Patent Application Laid-Open No. 11-78962, as shown in FIG. 10, the cross member 6 has bent portions 7 ′ and 7 ′ connected to both ends of the web 7 larger than the width of the flange 8. In the formed state, there are some which are bent at a right angle to the web 7 and intended to be fastened to the side members 1 and 1 'at the bent portion 7'.

In this case, as shown in FIG. 11, the developed width of the cross member 6 is constant, the scrap S indicated by the shadow line is small, and the yield is improved. However, the developed length is required to form the bent portions 7 ′ and 7 ′. And the effect of material saving is offset, and the molding process is increased by adding the folding process of the bent portions 7 'and 7', thereby increasing the investment in the mold and the processing cost, and further the bent portions 7 'and 7'. There are various problems such as the need to connect the flange 8 to the flange 8 and the assembly cost of the cross member 6 alone.
JP 11-78962 A

  The problem to be solved by the present invention is to provide a cross member that can achieve an improvement in yield, a reduction in material cost, a reduction in weight, and an improvement in fastening strength and rigidity with a side member.

The present invention for solving the above problems, the upper and lower in the center of the rectangular plate short rectangular web portions than the overall length of the cross member, and the end portion on the upper and lower sides of the said web portion integral with said web portion A flange portion having a wing-like portion in an opposing plan view is provided, and at the time of forming a cross member , the end portions of the upper and lower wing-like portions are projected beyond the web portion on the side opposite to the opening portion of the web portion. This is a cross member of a truck vehicle frame.

Crossmember truck vehicle frame of the present invention, the upper and lower in the center of the rectangular plate short rectangular web portions than the overall length of the cross member, and the end portion on the upper and lower sides of the said web portion integral with said web portion A flange portion having a wing-like portion is provided in a plan view opposite to each other, and at the time of forming a cross member , the end portions of the upper and lower wing-like portions are protruded beyond the web portion on the side opposite to the opening portion of the web portion . Improvement, reduction of material cost and weight reduction can be achieved, and the fastening strength and rigidity with the side member can be improved.

To illustrate preferred embodiments of the present invention with reference to FIG. 1 to FIG. 6, the cross member 11 of the present invention truck vehicle frame, the web portion 12 short rectangular than the overall length of the cross member 11 in the center of the rectangular plate material W1, In addition, flange portions 13 and 13 'having wing-like portions 14 and 14' in a plan view that is integral with the web portion 12 and vertically opposed to the end portion are provided on the upper and lower sides of the web portion 12, and when the cross member is formed, The end portions of the upper and lower wing-like portions 14 and 14 ' are projected beyond the web portion 12 on the side opposite to the open portion of the web portion .

  The embodiment shown in the drawing will be described in more detail. The completed state of the cross member 11 is as shown in FIGS. 1, 5 and 6. In the example of FIG. Are provided with rivet holes 16 for fastening rivets to the side members 1 and 1 '.

  In other words, the cross-cutting of the cross member 11 having the above-described configuration is described as follows. As shown in FIG. 2, the web portion 12 has a flange width on both the left and right sides of the normal length cross-member web portion. The length corresponding to the width of the web is removed, and the flange portions 13 and 13 'are formed by extending both sides of a bent line (two-dot chain line) with the web portion 12 of the flange portions 13 and 13'. The shape is bent to the opposite side of the flange portions 13 and 13 '. Therefore, the portion that becomes the scrap S is very small as shown by the shaded line, and the unfolded width is constant, so the yield is remarkably high. .

  When the cross member 11 configured as described above is fastened to the side members 1 and 1 'of the vehicle frame by the rivet holes 16, the extension line of the web portion 12 passes through the three rivet holes 16 as shown in FIG. Since the fastening portions with the side members 1, 1 'can be arranged on both sides with respect to the web surface of the cross member 11, inputs in the longitudinal direction of the cross member 11 can be evenly distributed, as shown in FIG. The fastening strength and rigidity can be greatly improved as compared with the conventional one, that is, the extension line of the web portion 12 is separated from the three rivet holes 16.

  Of course, if it is not necessary to improve the fastening strength and rigidity, it is possible to change the material of the cross member while maintaining the current status, and to reduce the plate thickness and reduce the material cost or reduce the weight. It becomes.

  FIGS. 5 and 6 show a modification of the cross member of the present invention. A rivet hole 16 formed at the ends of the flange portions 13 and 13 ′ of the cross member 11 is bent at a right angle so that the side members 1, 1 and 1 are bent. The rivet is fastened to fasten the rivet with the web (not shown). The one in FIG. 5 has the rivet hole facing upward and downward, and the one in FIG. 6 has the rivet hole facing up and down. It is a thing.

  The vehicle frame of the present invention cannot be used for anything other than a cross member.

It is a perspective view which shows an example of the cross member of the vehicle frame for this invention. FIG. 2 is a development view for cutting a plate of the cross member shown in FIG. 1. FIG. 6 is a schematic plan view showing an action state of force when the cross member of the truck vehicle frame of the present invention is fastened to the side member of the vehicle frame. It is a schematic plan view showing an action state of force when a cross member of a conventional truck vehicle frame is fastened to a side member of the vehicle frame. It is a perspective view which shows the other example of the cross member of the vehicle frame for this invention. It is a perspective view which shows the further another example of the cross member of the vehicle frame for this invention. It is a perspective view of the truck frame which should apply the cross member of the truck frame of the present invention. It is a figure which shows an example of the cross member of the conventional vehicle frame for trucks. FIG. 9 is a development view for cutting off the cross member of FIG. 8. It is a figure which shows the other example of the cross member of the conventional vehicle frame for trucks. FIG. 11 is a development view for cutting off the cross member of FIG. 10.

Explanation of symbols

1, 1 'Side member 2, 6, 11 Cross member 3 Car frame 4, 4', 8 Flange 5, 7 Web 12 Web part 13, 13 'Flange part 14, 14' Wing-like part 15 Opening part 16 Rivet hole S Scrap W Flat plate W1 Rectangular plate material.

Claims (2)

A flange portion having a rectangular web portion shorter than the entire length of the cross member at the center of the rectangular plate member, and a wing-like portion in plan view that is integrated with the web portion and vertically opposed to the end portion above and below the web portion provided with a cross member of the truck vehicle frame, characterized by comprising by projecting beyond the web portion of the end portion of the airfoil of the upper and lower during cross member molded on the side opposite to the opening portion of the web portion. The cross member of a truck vehicle frame according to claim 1, wherein an end portion of the wing-like portion is bent upward or downward to form a fastening portion with a side member.

Images