JPH0527349Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cab support structure for a tail-cab type cab-over type truck in which the cab is tiltable with respect to a frame.

[Prior Art] The cab support structure of the conventional tail cab type cab over type truck is shown in FIGS. 7 and 8.
This will be explained using figures.

In the figure, reference numeral 1 denotes a cab, and the front end of a main member 2 as a cab structural member supporting the cab 1 is connected to the front end of a frame 4 by a tail hinge pin 3. A downwardly convex upper member 5 is attached to the main member 2 on both sides of the lower rear end of the cab 1. A cushion shoulder 7 is attached to the cab support member 9 opposite to the upper member 5, and the cushion shoulder 7 has a concave V-shaped seat surface facing upward. A cushion rubber 6 is adhered to. In the figure, numeral 10 is a tail lock device for the cab 1.

[The problem that the idea aims to solve]

However, in the cab support structure of the conventional tail-cab type cab-over type truck, the horizontal force applied to the main member 2, which is the aggregate of the cab 1, is applied to the hinge pin 3 and the locking device 10.
Since the main member 2 is supported by an excessive inertial force F of the cab 1 that occurs during a vehicle collision, etc., there is a risk that the main member 2 may buckle and the cab 1 may be deformed forward about the hinge pin 3. Therefore, in 1983,
A cab support structure for a tail-cab type cab-over type truck as shown in the specification of No. 5404 was proposed.

This proposed content is as shown in Figure 9.
The tip of the upper member 5 is bent, and a lower member 11 having an L-shaped cross section with the tip bent is provided on the cab support member 9 opposite to this, and the inner side 5b of the tip 5a of the upper member 5 and the inner side 11a of the lower member 11 are connected to each other. are placed facing each other with an appropriate gap C.

However, in the cab support structure of this tail cab-type cab-over type truck, when the vehicle collides and the inner side 11a of the lower member 11 engages with the inner side 5b of the tip 5a of the upper member 5, the L-shaped lower portion simply Since the member 11 tends to bend from its base, if the thickness of the lower member 11 is increased to prevent this, there are problems in that bending becomes difficult and the weight increases.

The present invention was made to solve the above-mentioned problems, and its purpose is to prevent buckling of the cab structural members and deformation of the cab in the event of a vehicle collision, and to provide a high-strength tailed cab type cab-over type. An object of the present invention is to provide a cab support structure for a truck.

[Means to solve the problem]

In order to achieve the above object, the present invention connects the front end of the main member supporting the cab to the frame via a tail hinge pin, thereby making the cab tiltable, and allowing both sides of the lower rear end of the main member to move rearward and downward. A convex upper member was provided toward the frame, and a cushion shoulder having a concave V-shaped seating surface facing upward was provided on the cab support member on the frame side, facing the upper member, to support the cab. In the cab support structure of a tail-cab type cab-over type truck, a bent tip is formed at the lower part of the upper member, and a claw portion is formed on the cushion shoulder having a V-shaped seating surface, facing the tip of the upper member. A lower member is provided on both sides of the claw portion, the lower member consisting of a plate-shaped leg portion that is bent approximately perpendicularly and hangs down, the surface of which is disposed in the front-rear direction, and the claw portion of the lower member and the tip of the upper member are provided. It is characterized by having the parts facing each other at appropriate intervals.

[Effect]

During normal tilting, the claw portion of the lower member and the inner side of the tip portion of the upper member face each other with an appropriate distance, so that they do not interfere with each other.

In the event of a vehicle collision, etc., the claw of the lower member engages with the inner side of the tip of the upper member, and horizontal movement of the tip of the upper member is prevented by the legs on both sides of the claw of the lower member. This prevents buckling of the cab structural members and deformation of the cab.

In addition, when a force is applied from the side during a vehicle collision, the cushion shoulder has a convex upper member facing downward and a concave V-shaped seat plate facing upward. , forces from the sides are blocked, likewise preventing buckling of the cab structural members and deformation of the cab.

〔Example〕

Hereinafter, the cab support structure of the tail cab type cab over type truck according to the embodiment of the present invention will be explained as follows.
This will be explained based on FIGS.

In FIGS. 7 and 8, reference numeral 1 denotes a cab, and the front end of a main member 2 as a cab structural member supporting the cab 1 is connected to the front end of a frame 4 by a tail hinge pin 3. On both sides of the lower rear end of the cab 1, a downwardly convex upper member 5 is attached to a main member 2 as a cab structural member by a fastening member consisting of bolts and nuts 2a.
is attached to. As shown in FIGS. 1 and 2, the tip portion 5 of the plate-like member constituting the upper member 5
A is bent, and the inner side 5b is slightly upward.

A cushion shoulder 7 is attached to a cab support member 9 opposite to the upper member 5, and this cab support member 9 is supported by the frame 4 via a bracket 8. The cushion shoulder 7 has an upwardly concave V-shaped seat surface,
Cushion rubber 6 is adhered to the V-shaped seat surface. As shown in FIG. 5, the cab support member 9 is provided with a lower member 12 having a claw portion 12a, facing the tip portion 5a of the upper member 5, as shown in FIG. Lower member 12
consists of a claw portion 12a formed on the upper surface and leg portions 12 formed on both sides of the claw portion 12a, which are bent approximately vertically and hang down, and whose surfaces are plate-shaped and arranged in the front-rear direction.
b, 12b, and is formed into a U-shaped cross section by press working. The legs 12b, 12b face in the longitudinal direction of the vehicle and are fixed to the cushion shoulder 7 by welding. The inner side 5b of the tip of the upper member 5 and the claw portion 12a of the lower member 12 face each other with an appropriate distance C between them. In addition, in FIG. 8, 10 is a tail lock device of the cab 1.

At the time of tailing, as shown in Fig. 4, the trajectory D
The upper member 5 that moves in a line has an inner side 5 of its tip 5a.
b faces the claw portion 12a of the lower member 12 at an appropriate distance C, so that it does not interfere with the claw portion 12a.

At the time of a vehicle collision, as shown in FIGS. 3 and 4, the inner side 5b of the tip portion 5a of the upper member that moves diagonally along the trajectory E engages with the claw portion 12a of the lower member 12. At this time, the movement of the tip portion 5a of the upper member 5 in the diagonal direction is prevented by the leg portions 12b, 12b on both sides of the claw portion 12a of the lower member 12. Therefore, the main member 2 connected to the upper member 5
buckling and deformation of the cab 1 can be prevented.

Furthermore, when a force is applied from the side during a vehicle collision, the engagement between the downwardly facing convex upper member 5 and the cushion shoulder 7 having an upwardly facing concave V-shaped seat plate is prevented. Therefore, forces from the sides are blocked.

However, since the legs 12b, 12b are fixed in the longitudinal direction of the vehicle, they do not deform even when subjected to diagonal force by the upper member 5. Therefore, the cab support structure of the tail cab type cab-over type truck is Strength can be increased. As a result, the thickness of the lower member 12 can be reduced, the bending process becomes easier, and the weight can also be reduced.

Note that in this embodiment, the lower member 12 is the fifth
It is formed into a U-shaped cross section as shown in the figure, but
As shown in FIG. 6, one plate is pressed into a closed cross section, the mating surface portions 12c, 12c of the plate are used as the claw portions 12a, and the surfaces are bent approximately perpendicularly to both sides of the claw portions 12a. It is also possible to configure the lower member 12 with plate-like leg portions 12b, 12b arranged in the front-rear direction, and to weld the bottom portion 12d to the cushion shoulder 7.

[Effect of idea]

As described above, according to the present invention, in the cab support structure of a tail-cab type cab-over type truck, buckling of the cab structural members and deformation of the cab in the event of a vehicle collision etc. is prevented, and the lower member is prevented from buckling and deformation of the cab. By fixing the legs in the front and back direction of the vehicle,
It is possible to achieve high strength, and in turn, the thickness of the lower member can be reduced, bending can be performed easily, and the weight can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a rear view of the cab support structure of a tail-cab type cab-over type truck according to an embodiment of the present invention, and Fig. 2 is a partially sectional side view of the cab support structure of the tail-cab type cab-over type truck.
Fig. 3 is an enlarged view of part A in Fig. 2 and shows the state when engaged, Fig. 4 is an enlarged view of part A in Fig. 2 and is a state diagram when it is tilted, and Fig. 5 is a state diagram of the lower member. A perspective view, FIG. 6 is a perspective view showing another example of the lower member,
Fig. 7 is a side view of the cab support structure of the embodiment of the present invention and a conventional tailed cab type cab-over type truck, Fig. 8 is a rear view of the same, and Fig. 9 is the one proposed in the specification of Utility Application No. 1983-5404. FIG. 3 is a side view of the cab support structure of the tail cab type cab-over type truck. 1...Kiyabu, 2...Main member, 2a...
...Bolts and nuts (fastening members), 4...Frame,
5... Upper member, 5a... Tip, 5b... Inside, 9... Cab support member, 10... Tail lock device, 12... Lower member, 12a... Claw part,
12b... Leg, C... Spacing.

Claims (1)

[Scope of utility model registration request] The front end of a main member supporting the cab is connected to the frame via a tail hinge pin to enable the cab to tilt, and upper members convex toward the rear and downward are provided on both sides of the lower rear end of the main member, On the other hand, a concave V is formed in the cab support member on the frame side, facing the upper member and facing upward.
In the cab support structure of a tailed cab type cab-over type truck in which a cushion shoulder having a letter-shaped seat surface is provided to support the cab, a bent end portion is formed at the lower part of the upper member, and one V
A cushion shoulder having a letter-shaped seating surface has a claw portion facing the tip of the upper member, and a plate-shaped plate that is bent approximately perpendicularly to both ends of the claw portion and hangs down, and that the surface is arranged in the front-rear direction. 1. A cab support structure for a tail cab-type cab-over type truck, characterized in that a lower member consisting of a rounded leg is provided, and a claw portion of the lower member and a tip end of the upper member are opposed to each other with an appropriate interval.