JPS631655Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to a connecting member for easily and highly strength connecting vehicle body members constituting a vehicle body frame, and in particular to side members and cross members of large vehicles such as trucks. It is suitable for use as a connecting part with a member.

<Prior art> Large vehicles such as trucks and buses, as well as some passenger cars, employ body frames with a so-called ladder-type structure in which a cross member spans a pair of left and right side members that extend in the longitudinal direction of the vehicle body. ing.

As shown in FIG. 1, which shows the external appearance of a connecting portion of a cross member to a side member of a vehicle body frame, two substantially triangular connecting plates 1 called gussets or the like have conventionally been used. and,
The central portion 1a of these connecting plates 1 is attached to both upper and lower side end portions of a cross member 2 constituting a part of the vehicle body frame, and both end portions 1b are respectively connected to the upper and lower surfaces of a side frame (not shown). The member and the cross member 2 are connected via a connecting plate 1.

<Problems to be solved by the invention> In the conventional vehicle body frame connection structure as shown in Fig. 1 disclosed in Japanese Utility Model Application Publication No. 57-47480, the side members and cross members are connected and fixed on the same plane. Because the torsional force applied to the cross member generates high stress at the joints between the connecting plate, side members, and cross member, these cannot be joined by spot welding, etc., and riveted joints are used. The required bond strength was secured by using a combination of fillet welding and fillet welding.

For this reason, in the past, the assembly work of the vehicle body frame was complicated and time-consuming, and there were also problems in terms of parts management, etc., which led to high costs.

<Means for Solving the Problems> The connecting member of the vehicle body frame according to the present invention includes a side connecting portion connected to a side surface on the center side of the vehicle body of a side member disposed along the longitudinal direction of the vehicle body; an upper surface connecting portion extending from an upper end portion of the connecting portion toward the center of the vehicle body and connected to an upper surface of a cross member disposed along the vehicle width direction;
a lower surface connecting portion extending from a lower end portion of the side connecting portion toward the center side of the vehicle body and connected to a lower surface of the cross member; and a lower surface connecting portion extending from both front and rear ends of the side connecting portion toward the center side of the vehicle body. a pair of reinforcing parts each extending and having an upper end portion coupled to the upper surface coupling portion, and a lower end portion coupled to the lower surface coupling portion, respectively; the side coupling portion, the upper surface coupling portion, the lower surface coupling portion; The reinforcing portion is formed of a single plate material.

<Function> The connecting member of the vehicle body frame according to the present invention is a so-called vehicle body frame connecting member that includes a pair of left and right side members extending along the longitudinal direction of the vehicle body, such as a truck or a bus, and a cross member spanning between these side members. It is applicable to a ladder type structure, and the side members and the cross member are connected via this connecting member.

That is, the side members have their side surfaces joined to the side surface connecting portions of the connecting members, and the cross members have both upper and lower surfaces joined to the upper surface connecting portions and the lower surface connecting portions of the connecting members.

<Embodiment> As shown in FIG. 2, which shows the appearance of an embodiment of the vehicle body frame coupling member according to the present invention, the coupling member 10 of this embodiment is coupled to both upper and lower surfaces of the cross member 2 in the vertical direction A. A substantially triangular cross member upper surface connecting portion 10a and a cross member lower surface connecting portion 1
0b, a side member side connecting portion 10c that is integrally formed with these connecting portions 10a and 10b and connected in the horizontal direction B to the side surface of a side member (not shown), and reinforcing both front and rear end portions of this side member side connecting portion 10c. The connecting portions 10a to 10c and the reinforcing portion 10d are integrally formed by drawing a single plate.

Therefore, the cross member 2 is connected to both the upper and lower connecting portions 10a and 10b of the connecting member 10 in the vertical direction A, while the side frame is connected to the side connecting portion 10c of the connecting member 10 in the horizontal direction B. , when a torsional force is applied to the cross member 2, the side connecting portion 10c becomes a connecting portion to the side frame.
A force acts in a shear direction different from the conventional tensile direction. As a result, stress concentration does not occur in these joint parts and is dispersed in the horizontal direction, and the connecting member 10 itself has a box-shaped structure due to the reinforcing part 10d due to the drawing process of a single plate material, and its rigidity is increased. Since it is high, the generation of stress due to torsional force is also suppressed. Therefore, sufficient strength can be obtained by spot welding to connect the connecting member 10 to the cross member 2 and the side frame, and two joining methods, which use a combination of riveting and fillet welding as in the past, are required. The joining work is simpler and the number of man-hours required is reduced.

<Effects of the Invention> According to the connecting member of the vehicle body frame of the present invention, the connecting member used for connecting the cross member and the side frame is a pair of upper and lower connecting portions that are respectively connected to the upper and lower surfaces of the cross member in the vertical direction. The box-shaped structure is made up of a side connecting part and a reinforcing part that are connected horizontally to the side of the side frame, so even if torsional force is applied to the cross member, the rigidity is improved and the connection direction is changed to reduce stress concentration. This made it possible to spot weld each joint without any problems.

This facilitates the assembly work of the vehicle body frame and reduces the number of man-hours.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional vehicle body frame connection structure, and FIG. 2 is a perspective view of an embodiment of a connection member according to the present invention. Further, in the figure, 2 is a cross member, 10 is a connecting member, 10a is a cross member upper surface connecting part, 10
10c is a side member side connection part, b is a cross member lower surface connection part, 10d is a reinforcement part.

Claims (1)

[Scope of utility model registration request] A side connecting portion is connected to a side surface of a side member disposed along the longitudinal direction of the vehicle body on the vehicle body center side, and a side connecting portion is provided extending from the upper end portion of the side member toward the vehicle body center side, and the side member is arranged along the longitudinal direction of the vehicle body. an upper surface connecting portion connected to the upper surface of the cross member disposed along the direction; and an upper surface connecting portion extending from the lower end portion of the side connecting portion toward the center side of the vehicle body and connected to the lower surface of the cross member. a lower surface connecting portion; and a pair extending from both front and rear ends of the side surface connecting portion toward the center of the vehicle body, and having upper end portions each connected to the upper surface connecting portion and lower end portions respectively connecting to the lower surface connecting portion. A connecting member for a vehicle body frame, characterized in that the side connecting portion, the upper connecting portion, the lower connecting portion, and the pair of reinforcing portions are formed of a single plate material.