JPH08230714A - Cab of motor truck - Google Patents

Abstract

PURPOSE: To propose a cab of a motor truck, by which predetermined rigidity can be maintained even if the size and board thickness of a reinforcing gusset fixed to a back panel are reduced. CONSTITUTION: A quarter pillar 6 is formed by a quarter inner panel 10 and a quarter outer panel 11. A cab cross-direction outer end part 14d of a gusset 14 extended in the cross direction of a cab is spot-welded to a part 13c extended in the cab cross-direction W of a quarter panel reinforcing plate 13 fixed to the above panels 10, 11 to integrally fix both members.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cab of a truck having a back panel at a rear portion of a vehicle compartment and a quarter pillar fixed to an end of the back panel in a cab width direction.

[0002]

2. Description of the Related Art The cab of a truck is required to have a predetermined rigidity so that the cab is not largely deformed by an external force applied thereto. For this reason,
A quarter pillar reinforcing plate is arranged in a space formed by the quarter inner panel and the quarter outer panel that form the cab quarter pillar, and the reinforcing plate is fixed to the quarter inner panel and the quarter outer panel to reinforce the quarter pillar. A gusset is fixedly attached to the cab width direction end of the back panel and the quarter inner panel to reinforce the back panel. Moreover, the plate thickness of each element forming the cab is set to a sufficiently large value, and its rigidity Is increasing. However, if the plate thickness of each element of the cab is increased in this way, the total weight of the cab is increased and the cost thereof is inevitable. Therefore, when designing a cab, it is important to ensure sufficient rigidity of the cab, set the plate thickness of each element as thin as possible, and reduce the cost and weight thereof.

From this viewpoint, the present inventor examined the details of the relationship between the rigidity of each element constituting the cab and the plate thickness thereof by repeating various experiments. As a result, we were able to clarify the following new facts.

In the conventional cab, the cab width direction outer end portion of the gusset described above extends in the front-rear direction of the cab along the inner surface of the quarter-inner panel on the vehicle compartment side, and the quarter inner panel portion also extends in the front-rear direction of the cab. It is fixed by spot welding. The present inventor has conducted various studies on such a cab, and when an external force is applied to the cab and a vertical compressive load is applied to the quarter pillar, the quarter pillar is projected toward the outside of the vehicle compartment. It was clarified that a bending load caused the peeling load to act on the cab width direction outer end of the gusset and the spot-welded portion of the quarter inner panel.

As is well known, the spot welded portion shows a large strength against a shear load applied thereto, but the strength becomes relatively weak when a peeling load acts.

Therefore, when a peeling load acts on the spot welding portion between the cab width direction outer end portion of the gusset and the quarter inner panel as described above, the welding portion is easily separated. On the other hand, conventionally, without considering such a fact, uniformly set the size of the gusset and its plate thickness to be large, and increase the number of spot welding points between the gusset and the quarter inner panel. The bond strength between the two was increased and the detachment of the welded part was prevented. However, since each element forming the cab is generally made of a steel plate having a large weight per unit volume, the use of a large size gusset increases the weight of the cab and increases the manufacturing cost thereof. Moreover, if the number of welding points is increased,
The number of manufacturing steps is increased by that much, and the cost of the cab is also increased.

[0007]

SUMMARY OF THE INVENTION The present invention has been made based on the above-mentioned novel recognition, and an object thereof is to reduce the thickness and size of a gusset fixed to a back panel, Another object of the present invention is to provide a truck cab capable of ensuring a predetermined rigidity even if the number of spot welding points of the gusset with respect to the elements of the cab is smaller than in the conventional case.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a back panel located at a rear portion of a vehicle compartment and a cab width direction end portion of the back panel fixed in a substantially vertical direction of the cab. A quarter inner panel that extends and a quarter inner panel that is located outside the passenger compartment of the quarter inner panel and extends substantially in the vertical direction of the cab, and is fixed to the quarter inner panel and the back panel to form a quarter pillar together with the quarter inner panel. Quarter outer panel,
It is arranged in the space formed by the quarter inner panel and the quarter outer panel, is fixed to the quarter inner panel and the quarter outer panel, and is formed in the rear part of the vehicle compartment, and the quarter pillar reinforcing plate extending almost vertically in the cab. In a cab of a truck having a gusset fixed to a cab width end of a back panel portion located near a lower portion of the window opening, the cab width outer end of the gusset extends substantially in the cab width direction. At the same time, there is proposed a cab for a truck, characterized in that the outer end portion is fixed by spot welding to a portion of the quarter pillar reinforcing plate extending substantially in the cab width direction.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings, and the above-mentioned conventional drawbacks will be more concretely clarified with reference to the drawings.

FIG. 1 is a perspective view of a cab 1 of a truck to which an outfitting such as a window glass and a door are not yet attached, as seen from an oblique rear side thereof, and FIG. 2 is indicated by a reference numeral II in FIG. FIG. 3 is a partial perspective view of the portion as viewed from the inside of the cab 1 inside the vehicle. In these figures, the arrow Z indicates the forward direction of the completed truck, the arrow W indicates the width direction of the cab 1, and the arrow Y indicates the vertical direction of the cab 1.

Here, "front" or "rear" in this specification is based on the forward direction Z of the truck, and "left" or "right" is also "width" W of the cab 1. Right and left. The illustrated cab 1 is configured symmetrically when viewed in the forward direction Z of the truck, and therefore, in the following description, of the left and right configurations,
Mainly the configuration on the right side will be clarified.

The cab 1 shown in FIGS. 1 and 2 comprises a roof panel 2 which constitutes a ceiling plate in the upper part of the passenger compartment, a back panel 3 which is located at the rear of the passenger compartment, and a floor panel which constitutes the floor plate of the cab 1. 4, a front pillar 5 located on the left and right of the front part of the vehicle compartment, and a quarter pillar 6 located on the left and right of the rear part of the vehicle compartment. A window opening 8 into which a back window glass (not shown) is fitted and fixed is provided in the rear portion of the cabin of the cab 1.
Is formed, and also the front pillar 5 and the quarter pillar 6
Doors (not shown) are attached to the left and right door openings 9 defined by, for example. Cab 1 shown
In this case, the window opening 8 is defined by the upper edge 7 of the back panel 3 and the left and right quarter pillars 6 and the like, but the back panel 3 is extended to the roof panel 2 side upwards and The present invention can be applied to a cab having a window opening.

Here, FIG. 3 shows the upper edge 7 of the back panel 3.
3 is a horizontal cross-sectional view of the upper quarter pillar portion taken along line III-III in FIG. 1, and FIG. 4 shows the quarter pillar portion below the upper edge 7 of the back panel 3.
FIG. 4 is a horizontal sectional view taken along line IV-IV.

As shown in FIGS. 2 to 4, the quarter pillar 6 is located in the cab 1 and extends in the substantially vertical direction. The quarter inner panel 10 is located outside the vehicle cabin.
In addition, the quarter inner panel 10 has a quarter outer panel 11 extending substantially in the vertical direction Y of the cab 1, and the quarter inner panel 10 has a cab rear side end portion 10a whose cab width direction of the back panel 3 as shown in FIG. It is fixed to the end portion 3a by spot welding. Also, in the quarter outer panel 11, as shown in FIGS. 3 and 4, the cab rear side end portion 11a is located at the cab rear side end portion 10a of the quarter inner panel 10 and the cab width direction end portion 3a of the back panel 3. It is fixed by spot welding. The quarter outer panel 11 is the quarter inner panel 1
It composes a quarter pillar 6 together with 0.

On the other hand, as shown in FIGS. 5 and 2 which are cross-sectional views taken along the line VV of FIG. 1, the back panel portion near the lower part of the window opening 8, in the illustrated example, the upper part of the back panel 3 is a side surface of the passenger compartment. A back panel reinforcing plate 12 extending in the width direction W of the cab 1 is fixed to the back panel reinforcing plate 12, and upper and lower flange portions 12b and 12c of the back panel reinforcing plate 12 are closely attached to the back panel 3 and these flange portions 12b and 12c are attached. Are spot-welded to the back panel 3. The back panel reinforcing plate 12 cooperates with the back panel 3 to form a tunnel-shaped closed cross section. Thus, the cab 1 has the back panel reinforcing plate 12 that reinforces the back panel 3.

Here, FIG. 6 shows the height level at which the back panel reinforcing plate 12 is located, and the quarter pillar 6 is cut.
FIG. 6 is a sectional view taken along line VI-VI of FIG. 1, and as shown in this figure and FIGS. 2 to 4, the cab 1 is a quarter pillar reinforcing plate 1.
3, the reinforcing plate 13 is a quarter inner panel 1
0 and the quarter outer panel 11 are arranged in a space formed and extend substantially in the vertical direction Y of the cab 1. The cab front side end portion 13b of the quarter pillar reinforcing plate 13 is sandwiched between the cab front side end portions 10b and 11b of the quarter inner panel 10 and the quarter outer panel 11 and integrally fixed thereto by spot welding.

Further, as shown in FIGS. 2, 5 and 6,
The illustrated cab 1 has a gusset 14, and the gusset 14 is a vehicle interior side surface at a cab width direction end portion of a back panel portion located near a lower portion of a window opening 8 formed in a vehicle interior rear portion of the cab 1. It is fixed by spot welding. In this example, the gusset 14 is fixed by spot welding to the upper portion of the back panel 3 and to the end portion of the back panel 3 in the cab width direction. That is, the gusset 14 is positioned so as to cover the back panel reinforcing plate 12 as shown in FIGS. 2 and 5, and upper and lower flange portions 14a and 14b thereof are spot-welded to the back panel 3 and the back panel reinforcing plate 12. Has been done. In order to increase the rigidity of the back panel reinforcing plate 12, the portion 12d other than the upper and lower flange portions 12b and 12c is provided in the back panel 3.
Similarly, in the gusset 14, the portions 14c other than the upper and lower flange portions 14a and 14b are also separated from the portion 12d of the back panel reinforcing plate 12.

As can be seen from FIG. 6, of the cab rear side end portion 13a of the quarter pillar reinforcing plate 13, the portion facing and adjoining the cab width direction end portion 12a of the back panel reinforcing plate 12 is adjacent to the quarter outer panel 11. They are separated from each other and fixed to the gusset 14 by spot welding in a manner described later. Thus, the gusset 14 is also fixed to the quarter pillar reinforcing plate 13 by spot welding. On the other hand, as shown in FIGS. 3 and 4, among the cab rear side end portions 13 a of the quarter pillar reinforcing plate 13, the cab width direction end portion 12 a of the back panel reinforcing plate 12 is included.
The portions above and below the adjacent portion facing (FIG. 6) are sandwiched between the cab rear side end portions 10a and 11a of the quarter inner panel 10 and the quarter outer panel 11,
They are integrally fixed to each other by spot welding.
In this way, the quarter pillar reinforcing plate 13 is not limited to the cab front end portion 13b, but also the cab rear end portion 1b.
3a is also fixed to the quarter inner panel 10 and the quarter outer panel 11.

As described above, in the illustrated cab 1, the quarter pillar 6 has the quarter pillar reinforcing plate 1 inside.
Gusset 14 is fixed to the back panel 3 and the quarter pillar reinforcing plate 13, and the back panel 3 is reinforced by the back panel reinforcing plate 12, so that the rigidity of the cab 1 is surely increased. You can Each component of the cab 1 described above is made of, for example, a steel plate.

Here, the feature of this example is shown in FIG.
As shown in FIG. 5, the cab width direction outer end portion 14d of the gusset 14 extends substantially in the cab width direction W, and the outer end portion 14d extends substantially in the cab width direction W of the quarter pillar reinforcing plate 13. 13c is fixed by spot welding as shown by the mark X in FIG. In this example, the rear portion 13c of the quarter pillar reinforcing plate 13 including the cab rear side end portion 13a extends substantially in the width direction W of the cab 1, and the cab width direction outer end portion 14d of the gusset 14 is located in this portion 13c. It is spot welded. Further, in this example, as is clear from the mark X shown in FIG. 6, the gusset 14 is also fixed to the quarter inner panel 10 by spot welding, and the gusset 14 is spot welded to the quarter outer panel 11. You can also do it. As described above, in this example, the gusset 14 is fixed to the quarter pillar 6, but the gusset 14 may not be fixed to the quarter pillar 6 by spot welding. As described above, the cab 1 has a bilaterally symmetrical structure. Therefore, a gusset (not shown) provided on the left side of the cab 1 is similarly spot-welded to the left quarter pillar reinforcing plate and the quarter inner panel.

Here, in order to clarify the advantages of the above-described configuration, the structure of the conventional cab briefly described above and its drawbacks will be more specifically described. 9 and 10 show
It is a figure respectively corresponding to Drawing 2 and Drawing 6 which shows the structure of the conventional cab. The gusset 14 shown in FIGS. 9 and 10 is
The cab width direction outer end portion 14d extends in the front-rear direction of the cab 1 along the inner surface of the quarter inner panel 10 on the vehicle interior side, and the outer end portion 14d is indicated by a cross mark in FIGS. 9 and 10. As described above, it is fixed to the quarter inner panel 10 by spot welding. Other configurations are substantially the same as the cab shown in FIGS. 2 and 6.

After the cab 1 shown in FIGS. 9 and 10 is completed as a truck, an external force is applied to the cab 1 and a vertical compressive load is exerted on the quarter pillar 6, so that As described above, the quarter pillar 6 is bent and deformed in the direction in which the vertical middle portion thereof projects to the outside of the vehicle compartment as indicated by the arrow A in FIG. On the other hand, the gusset 14 is firmly fixed to the quarter inner panel 10, but is also firmly fixed to the back panel 3, so that when the quarter pillar 6 is bent and deformed to the outside of the vehicle compartment, Resists displacement to the outside of the passenger compartment. Therefore, a peeling load acts on the cab width direction outer end portion 14d of the gusset 14 extending in the front-rear direction of the cab 1 and the spot welding portion of the quarter inner panel 10. At this time, since the spot-welded portion has a relatively weak strength against the peeling load as described above, the cab width direction outer end portion 14d of the gusset 14 and the spot-welded portion of the quarter inner panel 10 are separated from each other at the peeled-off portion. It becomes easy to come off by the load.

Here, as shown in FIG. 11, when two steel plates 20 and 21 are sandwiched by electrode tips 22 and 23 of a spot welding machine and these steel plates 20 and 21 are spot-welded, the surface of each steel plate is The load in the direction P is the shear load, and the load Q in the direction orthogonal thereto is the peeling load. The spot-welded portion has a relatively weak bond strength against the peeling load Q.

Conventionally, the size of the gusset 14 and the plate thickness thereof are set large as shown in FIG. 9 and the spot welding point between the gusset 14 and the quarter inner panel 10 is set without considering the above facts. The number was increased and the bond strength was increased to prevent the two from separating, but this increased the weight of the cab,
And it was inevitable that the cost would rise.

On the other hand, in the cab 1 shown in FIGS. 1 to 6, the cab width direction outer end portion 14d of the gusset 14 extends in the cab width direction W and the outer end portion 14d thereof as described above. However, since it is spot-welded to the portion 13c of the quarter pillar reinforcing plate 13 extending substantially in the cab width direction, a compressive load acts on the quarter pillar 6 in the longitudinal direction thereof, and the vertical middle portion of the quarter pillar 6 is Even if the pillar 6 is bent and deformed so as to project to the outside of the vehicle compartment, a shear load acts on the spot welding point between the gusset 14 and the quarter pillar reinforcing plate 13,
The peeling load hardly acts. Therefore, the spot-welded portion exhibits a large strength, and thereby, the size and the plate thickness of the gusset 14 are made smaller than in the conventional case, and a large joint strength and rigidity are obtained even if the number of spot welding points is reduced. Therefore, the cab 1 can be given a predetermined large rigidity. Moreover, since the gusset 14 as a reinforcing member having a high strength and the quarter pillar reinforcing plate 13 are directly fixed to each other, the strength or the rigidity of the cab 1 is remarkably higher than the conventional one. Also in this example,
Since the gusset 14 is also fixed to the quarter inner panel 10 by spot welding, the rigidity of the cab 1 can be further enhanced. The same applies when the gusset 14 is spot-welded to the quarter outer panel 11 or both panels 10, 11. In this way, the weight and cost of the cab 1 can be reduced without hindrance while maintaining high rigidity and strength of the cab 1.

By the way, in the cab 1 of the completed truck, seat belts for passengers in the passenger compartment are equipped,
An anchor (not shown) for mooring the webbing of the seat belt is provided. The anchor is held by an anchor patch 15 spot-welded to the quarter pillar reinforcing plate 13, as shown in FIGS. 7 and 8.
That is, as shown in FIG. 7, the anchor patch 15
Both base ends 15a and 15b thereof are fixed to the inner surface of the quarter pillar reinforcing plate 13 by spot welding, and the patch 15 and the quarter inner panel 10 are formed on the outer surface of the anchor patch 15 on the outer surface of the vehicle. A weld nut 17 aligned with the attached mounting hole 16 is fixed in advance, and an anchor of the seat belt is screwed and fixed to the nut 17.

The above-described structure relating to the anchor patch 15 is adopted in the same manner in the conventional cab shown in FIGS. 9 and 10. However, in the conventional cab shown in FIGS. 9 and 10, since the cab width direction outer end portion 14d of the gusset 14 is spot-welded exclusively to the quarter inner panel 10 as described above, The manufacturing process of the cab 1 had to be complicated. That is, when manufacturing the cab 1, first, the quarter inner panel 10 and the gusset 14 shown in FIG. 10 are fixed by spot welding to form a first assembly, while the quarter pillar reinforcement shown in FIG. Anchor patches (FIG. 7) 15 are spot welded to the plate 13 to form another second assembly. Thereafter, these first and second assemblies are fixed to each other by spot welding to obtain a third assembly. Next, this third assembly and the quarter outer panel 11 shown in FIG. 10 are assembled and spot welded to obtain a fourth assembly.
A fourth assembly for the left side of the cab is manufactured in exactly the same way. Subsequently, both of the fourth assemblies are assembled by spot welding into a fifth assembly obtained by spot welding the back panel 3 and the back panel reinforcing plate 12 shown in FIG. 10 to be integrated. Thus, assembling on only one side of the cab rear requires five steps.

On the other hand, in the cab shown in FIGS. 1 to 7, as shown in FIG. 8, the quarter pillar reinforcing plate 13 is first attached to the cab width direction outer end portion 1 of the gusset 14.
4d is spot-welded and the anchor patch 15 is spot-welded to obtain the first assembly. Anchor patch 1
Since both 5 and the gusset 14 are fixed to the quarter pillar reinforcing plate 13, they can be fixed in one process.
Spot welding is possible. Next, the quarter inner panel 10 is fixed to the first assembly by spot welding to obtain a second assembly, and then the second assembly is spot welded to the quarter outer panel 11 to form a third assembly. To get The third assembly for the left side of the cab is similarly constructed. Next, these third assemblies are integrally assembled by spot welding to the fourth assembly obtained by spot welding the back panel 3 and the back panel reinforcing plate 12 shown in FIG.

Since the gusset 14 and the anchor patch 15 are spot-welded together on the quarter pillar reinforcing plate 13 in this manner, both of them can be welded in one step on each side of the cab (two steps for right and left matching). , 1 more than before
It is possible to reduce the work process (two processes in total). Thus, according to the illustrated cab, there is an advantage that the manufacturing process can be simplified.

The present invention can be applied to various types of trucks other than those shown in the drawings, for example, a cab of a double cab type truck, and can be widely applied to a cab without the back panel reinforcing plate 12 shown in the drawing. is there.

[0031]

According to the present invention, the outer end of the gusset in the cab width direction is extended in the width direction of the cab, and the outer end of the gusset is fixed to a portion of the quarter pillar reinforcing plate extending substantially in the cab width direction by spot welding. Therefore, when a longitudinal load is applied to the quarter pillar in the longitudinal direction, a shear load acts on the spot welding point between the gusset and the quarter pillar reinforcing plate. Therefore, even if the gusset size and plate thickness are set smaller than before, and even if the number of spot welding points between the gusset and the quarter pillar reinforcing plate is reduced, the bonding strength between the two can be sufficiently secured and the cab The rigidity can be kept high. Further, since the quarter pillar reinforcing plate as the reinforcing member and the gusset are fixed to each other, the rigidity of the cab can be further enhanced. As a result, the weight of the cab and its cost can be reduced.

[Brief description of drawings]

FIG. 1 is an external perspective view of a cab according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional perspective view of the cab shown in FIG. 1 as viewed from the vehicle interior side.

FIG. 3 is an enlarged sectional view taken along line III-III in FIG.

FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG.

5 is an enlarged cross-sectional view taken along line VV of FIG.

6 is an enlarged sectional view taken along line VI-VI of FIG.

FIG. 7 is an enlarged cross-sectional view taken along line VII-VII of FIG.

FIG. 8 is a perspective view illustrating an assembling procedure of each component of the cab.

9 is a perspective view similar to FIG. 2, showing an example of a conventional cab.

10 is a sectional view of the conventional cab shown in FIG. 9, similar to FIG.

FIG. 11 is a diagram illustrating a shear load and a peeling load at a spot welding point.

[Explanation of symbols]

 1 cab 3 back panel 3a width direction end 6 quarter pillar 8 window opening 10 quarter inner panel 11 quarter outer panel 13 quarter pillar reinforcing plate 13c part 14 gusset 14d cab width outer end W cab width direction Y vertical direction

Claims (1)

[Claims] 1. A back panel located at a rear portion of a passenger compartment,
A quarter inner panel fixed to an end portion of the back panel in the cab width direction and extending substantially vertically of the cab, and a quarter inner panel located outside the vehicle compartment of the quarter inner panel and extending substantially vertically of the cab. It is fixed to the panel and the back panel, and is arranged in the space formed by the quarter outer panel and the quarter outer panel forming the quarter pillar together with the quarter inner panel and the quarter inner panel and the quarter outer panel. Fixed,
A cab of a truck including a quarter pillar reinforcing plate extending substantially vertically of the cab, and a gusset fixed to a cab width direction end of a back panel portion located near a lower portion of a window opening formed in a rear portion of a vehicle compartment. The cab width direction outer end portion of the gusset extends substantially in the cab width direction, and the outer end portion is fixed by spot welding to a portion of the quarter pillar reinforcing plate extending substantially in the cab width direction. The cab of the truck characterized by.