JP4094745B2 - Cab mount bracket - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cab mount bracket for supporting a cab of a truck on a chassis frame.
[0002]
[Prior art]
As shown in FIG. 9, a cab a that generally forms a cab of a truck is generally supported at the front end of a chassis frame b so as to be swingable, and both rear ends are supported by side members c and c of the chassis frame b. It is supported by a pair of attached cab mount brackets d and d.
[0003]
As shown in FIG. 10, the cab mount brackets d and d have a seat surface f that supports the cab a on the top of a substantially trapezoidal bracket body e, and an upper mounting surface l that is parallel to the seat surface f. And a side mounting surface g on the opposite surface of the seating surface f. The mounting surfaces 1 and g are connected to the vehicle outer side surface from the upper surface of the side members c and c by fastening bolts h or rivets (not shown). The seat surface f is positioned so as to be offset outward from the side members c and c, so that both ends of the rear portion of the cab a are stably supported.
[0004]
[Problems to be solved by the invention]
By the way, in the conventional cab mount bracket d having such a structure, since the load is concentrated on the mounting surface g side, after forming the bracket body e as shown, the vicinity thereof, for example, the upper surface and the back surface side thereof Reinforcing plates i and j are added to the mounting surface g, respectively.
[0005]
However, in such a structure in which the reinforcing plates i and j are added later, at the time of manufacture, in order to process each component separately, the purchase and management of the plate material are performed independently, and the blank is independently used. There is a problem that a pressing process for forming the base material or the molding is required, and there is a problem that a considerable number of man-hours and processes are required. Thus, the production efficiency is low and the production cost is high.
[0006]
In addition to the cab mount brackets d and d, there is also a cab mount bracket k having a structure in which a seat surface f and a reinforcing plate i are welded and assembled to a bracket body e as shown in FIG. Although it has been proposed, welding work to assemble multiple parts like these requires an assembly jig to improve and stabilize the mutual positioning accuracy of the parts to be assembled. Cost and time are required, which causes the product development period to become longer, and causes production deterioration such as production adjustment for jig correction. As described above, there are many problems in the conventional structure composed of a plurality of parts, and it has been difficult to achieve improvement in production efficiency and reduction in production cost.
[0007]
Accordingly, the present invention has been devised to effectively solve such problems, and an object of the present invention is to provide a novel cab mount bracket that is easy to manufacture and can reduce manufacturing costs. It is.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a seating surface on which a cab pedestal positioned substantially obliquely on the vehicle outer side from a side member of a chassis frame and a lower surface extending from the seating surface toward the side member are opened. A cab mount bracket comprising: a bracket body having a substantially U-shaped cross section; and a mounting surface for fastening the bracket body from the upper surface of the side member to the vehicle outer side surface. The bracket body and the mounting surface are integrally formed by folding a single plate material, and the mounting surface side is reinforced by folding and overlapping the plate material.
[0009]
In other words, the seating surface, the bracket body, and the mounting surface are folded and integrated into a single piece, eliminating the need for conventional multiple-part manufacturing and assembly welding operations, greatly increasing production efficiency. Can be improved.
[0010]
Further, when the plate material is folded and formed, the strength can be easily improved by forming the mounting surface on which the load is concentrated by overlapping the two plate materials.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, a preferred embodiment for carrying out the present invention will be described with reference to the accompanying drawings.
[0012]
FIG. 1 is a perspective view showing an embodiment of a cab mount bracket 1 according to the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a perspective view showing a use state thereof.
[0013]
As shown in the drawing, a seat surface 2 on which a pedestal a2 of a cab a located substantially obliquely outside the vehicle is placed from the side members c and c of the chassis frame b, and extends from the seat surface 2 toward the side member c. A bracket body 3 having a substantially U-shaped cross section with the lower surface open, and a mounting surface 4 for fastening the bracket body 3 from the upper surface of the side member c to the vehicle outer side surface. .
[0014]
Further, as shown in the figure, the seat surface 2 is formed by drilling a mounting hole 2b in the center of a horizontally located rectangular flat plate 2a, and the base of the cab a shown in FIG. 3 on the flat plate 2a. While a2 is mounted, the base a2 mounted by a fastening bolt or the like (not shown) is supported and fixed on the flat plate 2a.
[0015]
The front and rear edges of the seat surface 2 in the vehicle direction and the flange portions 3a and 3a of the bracket body 3 are connected by welding.
[0016]
Further, the mounting surface 4 has an upper mounting surface 4a in contact with the upper surface of the side member b and a side mounting surface 4b in contact with the vehicle outer side surface of the side member b connected in an L-shaped cross section. In addition, the mounting surface 4 is overlapped by folding the end portion on the upper mounting surface 4a side, and the two overlapping surfaces are closely fixed by a plurality of spot weldings.
[0017]
The seat surface 2, the bracket main body 3, and the mounting surface 4 are integrally formed by three-dimensionally folding a single plate member 6 and are connected to each other.
[0018]
In the cab mount bracket 1 configured as described above, since a single plate material 6 is used and the whole is a continuous and integrated structure, a reinforcing plate can be added later or a plurality of parts can be added. As in the case of a cab mount bracket made of the above, individual manufacturing of a plurality of parts and welding work for assembly are not required, and manufacturing is facilitated.
[0019]
Moreover, the strength can be easily improved by stacking two mounting surfaces 4 on which loads are concentrated and tightly fixing them by spot welding.
[0020]
Next, a method for forming the cab mount bracket 1 having such a structure will be described.
[0021]
First, a steel plate having a uniform thickness is prepared, and a plate 6 having a shape as shown in FIG. 4 is formed by a punching machine.
[0022]
As shown in the figure, the plate 6 has a rectangular central plate 7 located in the center, and side plates 8 and 8 having substantially trapezoidal shapes on both sides thereof are continuously formed in a mirror shape. 7 is a rectangular lower flat plate 9 below the upper plate 11, an upper flat plate 11 is connected to the upper lower plate 9 via a connecting plate 10, and flange plates 12 and 12 are continuously connected to the side plates 8 and 8 on the upper flat plate 11 side. The center plate 7 and the side plates 8 and 8 form the bracket body 3 described above by press working as will be described later, and the connecting plate 10, the upper plate 11, and the flange plates 12 and 12 are also described above. In addition to forming the mounting surface 4, the lower flat plate 9 also forms the seat surface 2 described above.
[0023]
That is, the plate material 6 having such a shape is installed in a press machine, and the virtual boundary lines S1 to S6 formed on the plate material 6 are pressed at a predetermined angle as shown in FIGS. A press-molded product as shown in FIG. 8 is completed by folding or mountain-folding and three-dimensionally folding. Further, the completed press-formed product is welded between the seating surface 2 and the bracket main body 3 as described above, and spot welding is performed on the two surfaces of the mounting surface 4 which is also the above-described two-layered structure as shown in FIG. Thus, the cab mount bracket 1 of the present invention can be obtained.
[0024]
More specifically, after a flat plate material 6 as shown in FIGS. 4 and 5 is installed in a press machine having a predetermined die, a virtual boundary between the central plate 7 and the connecting plate 10 in FIG. The virtual boundary lines S2 and S2 between the line S1 and the side plates 8 and 8 and the flange plates 12 and 12 are valley-folded, and at the same time, the folding line S3 in the center of the connecting plate 10 is folded in a mountain, and the connecting plate 10 and the upper portion A virtual boundary line S4 with the flat plate 11 is valley-folded to press-mold a first preform product P1 as shown in FIG. The first preform product P1 and the second preform product P2 to be described later are instantaneously three-dimensionally press-molded simply by operating a mold installed in the press machine for one stroke. Further, the mounting hole 2b described above is formed in the central portion of the lower flat plate 9 serving as the seating surface 2 at the time of press forming or die cutting of the plate material 6 or the like.
[0025]
Next, after the first preform product P1 molded in this way is installed in a press machine in which another mold is set or a press machine in which another mold is replaced, the central plate 7 in FIG. And the virtual boundary lines S5 and S5 between the side plates 8 and 8 and the virtual boundary line S6 between the central plate 7 and the lower flat plate 9 are folded in the same direction, and the bracket body 3 and the seat as shown in FIG. The second preform product P2 on which the surface 2 is formed is press-molded.
[0026]
Finally, after the second preform P2 is installed in a press machine in which another mold is set or a press machine in which another mold is replaced, the fold line S3 in the center of the connecting plate 10 is placed. Are further folded and the connecting plate 10 and the upper flat plate 11 and the flange plates 12 and 12 are overlapped as shown in FIG.
[0027]
Thereafter, if necessary, an appropriate number of bolt holes 4c (six in this embodiment) are formed in the edge portion of the mounting surface 4 by a press machine or the like to form a press as shown in FIG. The product is completed.
[0028]
Further, the completed press-molded product is welded between the seating surface 2 and the bracket body 3 as described above, and two spot weldings are performed on the mounting surface 4 which is also the above-described two layers, as shown in FIG. The cab mount bracket 1 of the present invention is obtained.
[0029]
And, in the cab mount bracket 1 of the present invention having such a structure, since all members of the seat surface 2, the bracket body 3, and the mounting surface 4 have a continuous integrated structure, Since the welding work for individual production and assembly of a plurality of parts is not required and the production becomes easy, excellent production efficiency can be exhibited.
[0030]
In addition, the mounting surface 4 on which the load concentrates is formed by stacking two plate materials 6 and is closely adhered and fixed by spot welding. Therefore, the mounting surface 4 is superior to the conventional product with a thick plate added. The cab mount bracket 1 having high reliability and high reliability can be obtained.
[0031]
【The invention's effect】
In short, according to the present invention, the following excellent effects can be exhibited.
[0032]
(1) Since a single plate is folded and integrally formed, it is possible to eliminate the irrationality such as the increase in the work process accompanied by the welding work for manufacturing and assembling each member as in the past. Can be greatly improved.
[0033]
(2) As a result, the production cost can be reduced and the product unit price can be reduced.
[0034]
(3) In addition, since the mounting surfaces that require strength are formed in two layers, the strength can be as high as that of conventional products using thick plates, providing highly reliable products. can do.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a cab mount bracket according to the present invention.
FIG. 2 is a side view showing an embodiment of a cab mount bracket according to the present invention.
FIG. 3 is a perspective view showing an example of a mounting state of the cab mount bracket according to the present invention.
FIG. 4 is a development view of the cab mount bracket according to the present invention.
5A is a perspective view showing a plate material forming a cab mount bracket according to the present invention, and FIG. 5B is a side view thereof.
6A is a perspective view showing a first preform product of a cab mount bracket according to the present invention, and FIG. 6B is a side view thereof.
7A is a perspective view showing a second preform product of the cab mount bracket according to the present invention, and FIG. 7B is a side view thereof.
FIG. 8 is a perspective view showing a cab mount bracket according to the present invention.
FIG. 9A is a schematic view showing a mounting state of a conventional cab mount bracket, and FIG. 9B is a view taken along the line XX in FIG.
10A is a perspective view showing an example of a conventional cab mount bracket, and FIG. 10B is a side view thereof.
11A is a perspective view showing another example of a conventional cab mount bracket, and FIG. 11B is a side view thereof.
[Explanation of symbols]
1 Cab mount bracket 2 Seat surface 3 Bracket body 4 Mounting surface 6 Plate material a Cab b Chassis frame c Side member

Claims (1)

It consists of a seat surface on which a cab base located substantially obliquely outside the vehicle from the side member of the chassis frame is placed, and a substantially U-shaped cross section in which a lower surface extending from the seat surface toward the side member is opened. In a cab mount bracket having a bracket body and a mounting surface for fastening the bracket body from the upper surface of the side member to the vehicle outer side surface, the seat surface, the bracket body, and the mounting surface are combined into one sheet. A cab mount bracket characterized by being integrally formed by folding a plate material and reinforcing the mounting surface side by folding and overlapping the plate material.

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