JPH0541981Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a rear cab mantaining frame that is made of a pipe member and uses the pipe member as an atmosphere communication path.

(Prior Art) A substantially inverted U-shaped pipe member 4 is bridged between the left and right side members 2 and 3 of the chassis frame 1 of a tilt cab type truck, and the rear part of the driver's cab 5 is secured to this pipe member 4. One end 4 of member 4
a, the other end 4b is closed, and the closed end 4b is closed.
An atmosphere suction port 6 is provided on the side pipe member side wall 4c,
A rear cab mantaining frame is known in which the pipe member 4 is used as an atmosphere communication path that communicates with the atmosphere from the atmosphere inlet 6 through the open end 4a (FIGS. 1 and 2).

The atmospheric air intake port 6 of this type of rear cab mantaining frame is connected to a known negative pressure control device that controls the operation of, for example, an exhaust brake or an intake shutter. More specifically, the butterfly valve 8 of the exhaust brake and intake shutter is driven by an actuator 9 whose operating pressure is a pressure that is a combination of negative pressure generated in the intake manifold of the engine (not shown) and atmospheric pressure. The magnitude of the operating pressure is controlled by an electromagnetic three-way valve 10, which is a negative pressure control device having an intake negative pressure port and an atmospheric pressure port on the input side. Atmospheric pressure supplied to the electromagnetic three-way valve 10 is introduced from the open end 4a of the pipe member 4 via the atmosphere suction port 6.

(Problem to be solved by the invention) Such a conventional rear cab manting frame used as an atmosphere communication passage has an atmosphere intake port 6.
An air inlet 6 is provided in the side wall 4c of the pipe member on the side of the closed end 4b so as not to suck in muddy water or car wash water splashed up by the wheels. However, the open end 4
A part of the muddy water 11 splashed up by the wheels on the a side collides with the inner wall of the pipe member near the opening end 4a and scatters.
This is inconvenient because it is guided into the pipe member 4 on the side of the air intake port 6 together with the intake air, and is sucked into the negative pressure control device from the air intake port 6, or accumulates at the closed end 4b (reference numeral 12 in FIG. 2). It was hot.

The present invention has been made to solve such inconveniences, and the object is to provide a rear cab mantaining frame that prevents water splashing up from wheels and car wash water from entering from the open end of the pipe member. .

(Means for solving the problem) According to the present invention, in order to achieve the above-mentioned purpose,
It consists of a generally inverted U-shaped pipe member that is bridged between the left and right side members of the chassis frame of a tilt cab type truck and that locks the rear part of the driver's cab.One end of the pipe member is open and the other end is closed. In a rear cab mantaining frame in which an air inlet is provided in the side wall of a side pipe member, and the pipe member is used as an air communication path that communicates with the atmosphere from the air inlet through the open end, the pipe member is connected to the left and right sides. is bridged in contact with each outer wall of the side member, the peripheral wall at the opening end is suspended downward from the lower surface of the side member, and the wall on the side opposite to the side member of the suspended peripheral wall is cut out. A rear cab manting frame is provided which is characterized by:

(Function) The hanging wall at the opening end prevents water splashed by the wheels and car wash water from colliding with the inner wall at the opening end, while
Since the wall on the side of the peripheral wall facing the side member is cut out, water droplets that fly toward this cutout will skim the pipe member and collide with the lower surface of the side member, and the collided water droplets will be directed in the direction of travel. This prevents water from splashing up from the wheels and water from washing the car from entering the pipe members.

(Example) An example of the present invention will be described below with reference to the drawings.

Figures 3 to 5 show the respective shapes near the open end and closed end of the rear cab mantaining frame according to the present invention, and in these drawings, the same symbols as in Figures 1 and 2 are given. have substantially the same shape and function as these.

A pipe member 4 having a substantially inverted U shape has both ends 4
a and 4b are fixed to left and right side members 2 and 3 of the chassis frame, respectively. This pipe member 4 may be welded to the side members 2, 3, or a flange may be attached to the pipe member 4, and this flange may be attached to the side members 2, 3 with bolts and nuts. The peripheral wall of the open end 4a of the pipe member 4 hangs downward from the lower surface 3a of the side member 3, and the wall on the side facing the side member 3, that is, the open end 4
A portion of the wall on the side a, which is far from the unillustrated wheels, is cut out to form a hanging wall 4d. The height H of this hanging wall 4 (the length that projects downward from the lower surface 3a of the side member 3) is set to an appropriate value depending on the relative positional relationship between the wheel and the opening end 4a. The notch width of the notch portion of the hanging wall 4d is set to an appropriate value of 1/2 to 1/3 of the outer circumference of the pipe member 4.

When the open end 4a is formed in this way, the hanging wall 4
While the outer wall d prevents the water 11 splashed up by the wheels and the car wash water from colliding with the inner wall of the open end 4a of the pipe member 4, the hanging wall 4d is cut out.
The water droplets that have flowed towards this notch will pass through the pipe member 4 and will pass through the lower surface 3a of the side member 3.
The collided water droplets fly away in the direction of travel (Figure 3). In this way, water splashed by the wheels or car wash water is prevented from entering the pipe member 4, and the hanging wall 4d has a draining effect.

On the other hand, the closed end 4b of the pipe member 4 is closed with a blind plate 14, which contacts the side wall 4c of the pipe member 4 near the blind plate 14, preferably the inner upper surface of the blind plate 14, and has a drainage hole in the rear side wall 4c. 15 is bored (Fig. 5).

Even if water such as car wash water intrudes from the open end 4a, the water accumulated in the closed end 4b will be removed by the drain hole 15. In addition, since the drain hole 15 is formed in the side wall 4c of the pipe member 4, water splashed by the wheels does not directly enter the drain hole 15, and even if water floods, it will not flood like the open end 4a. Water droplets are not taken into the intake air and reach the air intake port 6, and the water droplets are immediately removed from the drain hole 1.
Water is drained from 5.

An open end 4a and a closed end 4 of a rear cab mantaining frame made of the pipe member 4 of the present invention
The relative positional relationship between the wheels A and B and the two wheels A and B is shown in FIG. 6.

As is clear from the figure, water splashed up by the wheels A when the vehicle is running reaches the closed end 4b, but hardly reaches the open end 4a located further away. Conversely, the water splashed up by the wheels B reaches the open end 4a, but hardly reaches the closed end 4b, which is further away.

In this way, when the tilt cab type truck runs through a puddle on the running road surface C and splashes water, the wheels B are near the opening end 4a and the hanging wall 4d.
Since the wheel B is located on the outer side of the vehicle, most of the splashed water that tries to enter the opening end 4a is
, and jumps from the side where the hanging wall 4d is provided. Water splashed by the wheel A on the opposite side also flies toward the notch side of the opening end 4a, but the distance from the wheel A to the notch is long, and the probability of successfully hitting the notch and reaching the notch is quite small.

Therefore, the present invention has an open end peripheral wall hanging downward from the lower surface 3a of the side member, and has a structure in which the wall on the side facing the side member is cut out. Infiltration of water flying from wheel B can be effectively prevented. Naturally, water from wheel A hardly ever enters the pipe member from the notch side. Therefore, when viewed as a whole, the practical effect of significantly suppressing water intrusion is achieved.

(Effects of the invention) As detailed above, according to the rear cab manting frame of the invention, the pipe member is bridged in contact with the outer walls of the left and right side members, and the peripheral wall at the open end is connected to the outer wall of the side member. Since the pipe member is made to hang downward from the lower surface, and the wall on the side opposite to the side member of this hanging peripheral wall is cut out, it is possible to prevent water from splashing up from the wheels and flooding from car wash water from the open end of the pipe member. . In addition, since the peripheral wall of the open end of the pipe member is allowed to hang down and only a portion of it is cut out, there is no need for any special parts for draining, making it easy to process, reducing processing costs, and providing a good appearance. It has various effects.

[Brief explanation of the drawing]

Fig. 1 is a side view of a tilt cab type truck showing how the rear cab mantaining frame according to the present invention is installed, Fig. 2 is a sectional view showing the configuration of a conventional rear cab mantaining frame, and Fig. 3 is Partial sectional view near the open end of the pipe member of the rear cab mantaining frame of the present invention, No. 4
The figure is a partial side view taken in the direction of arrow A in FIG. 3, FIG. 5 is a partial sectional view of the vicinity of the closed end of the pipe member of the rear cab manting frame of the present invention, and FIG. 6 is a side view of the rear cab according to the present invention. FIG. 3 is a diagram for explaining the effect of a manting frame. 1... Chassis frame, 2, 3... Side member, 4... Pipe member, 4a... Open end, 4b...
...Closed end, 4c... Side wall, 4d... Hanging wall (peripheral wall), 5... Driver's cab, 6... Atmosphere inlet, 15...
...Drain hole.

Claims (1)

[Scope of utility model registration request] It consists of a generally inverted U-shaped pipe member that is bridged between the left and right side members of the chassis frame of a tilt cab type truck and that locks the rear part of the driver's cab.One end of the pipe member is open and the other end is closed. In a rear cab mantaining frame in which an air inlet is provided in the side wall of a side pipe member, and the pipe member is used as an air communication path that communicates with the atmosphere from the air inlet through the open end, the pipe member is connected to the left and right sides. is bridged in contact with each outer wall of the side member, the peripheral wall at the opening end is suspended downward from the lower surface of the side member, and the wall on the side opposite to the side member of the suspended peripheral wall is cut out. The rear cab manting frame is characterized by