JPH0225691Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cab front structure for soundproofing the engine of a cab-over type vehicle.

Conventional cab-over type trucks, for example as seen in Utility Model Application No. 16127/1983, have a grating on the front of the cab 1 as shown in Figures 1 and 2 because the engine is mounted under the cab floor. A radiator grill 2 of the shape is attached, and this radiator grill 2
A radiator 3 is arranged behind the engine, and above the radiator 3 and the engine body E is a cab chamber C.
A cab panel 5 separating the inside and outside is provided.

The cab panel 5 around this radiator 3 is
It consists of a front inner panel 5a forming a front part, an upper wall part 5b and a side wall part 5c of a floor panel, and an outside air introduction passage A of the radiator 3 is defined by the upper wall part 5b and side wall part 5c, and this passage A The front inner panel 5a which is open defines a space B behind the radiator grille 2. Air intake ports 6a, 6b, 7l, and 7r of ventilators for introducing outside air into the cab chamber C open into this space B. The engine body E is surrounded by shielding walls 9a, 9b, etc. to block transmission of engine noise to the outside.

However, as shown by the arrow in FIG. 1, a part of the engine noise is transmitted from the radiator 3 to the space B through the outside air introduction passage A, and within the space B, it is reflected and resonated by the radiator grille 2, bumper 8, etc. Ventilator air intake 6a, 6b, 7l, 7r
The noise was transmitted into the cab chamber C through the cable passage hole (not shown), etc., making the noise inside the cab chamber C high.

The present invention was developed by focusing on these problems, and includes a partition wall that divides the space defined by the radiator grille and cab panel into an outside air introduction passage that communicates with the radiator and a space that communicates with the ventilator. By forming at least either the cab panel or the radiator grill into a rectangular shape that surrounds the outside air introduction passage from both sides and the top surface, and opening the air intake ports of the ventilator on both outsides of the outside air introduction passage, the inside of the cab The purpose is to prevent noise.

Embodiments of the present invention will be described below based on the accompanying drawings. Components that are the same as those of the conventional example shown in FIGS. 1 and 2 are denoted by the same reference numerals.

As shown in FIG. 3, the cab panel 5 extends the upper wall portion 5b and side wall portion 5c of the floor panel to form a rectangular partition wall 11 that stands up on the front inner panel 5a.

As shown in FIG. 4, the radiator grille 2 is integrally formed with a U-shaped partition wall 12 that stands up from its back surface 2a and engages with the partition wall 11. As shown in FIG.

As shown in FIG. 5, the radiator grille 2 engages the inner surface of the partition wall 12 with the outer surface of the partition wall 11 of the front inner panel 5a to define an air introduction passage A from the space B, and the outside air introduction passage A is It opens directly into the grid section 2b of the radiator grille 2.

A sound absorbing material 15 is attached to the inner surface of the upper wall part 5b, side wall part 5c, partition wall 11 of the cab panel 5, and the partition wall 12 of the radiator grille 2 to increase the sound absorption effect of the wall surface defining the outside air introduction passage A.

In addition, as shown in FIG. 6, the partition wall 11 and the partition wall 1
2 may be provided with a rubber 16 attached to the end of one of the partition walls 11 to abut against the other partition wall 12 to improve the sealing performance of the engagement part.

According to the above configuration, outside air is supplied to the radiator grill 2
The air intake ports 6a, 7l, 7r of the ventilator are passed through the space B from the lattice portion 2C outside the partition wall 12 of the ventilator.
It is taken into the cab chamber C from there.

In addition, since the outside air introduction passage A opens directly into the grid section 2b inside the partition wall 12 of the radiator grille 2, the outside air flows smoothly after passing through the grid section 2b and is sent to the radiator 3, improving the cooling effect of the radiator 3. can be measured.

Since the partition wall 12 defines a space B in which the air intake ports 6a of the ventilator are opened on both sides of the outside air introduction passage A, the engine noise that passes through the radiator 3 and resonates by the radiator grille 2 and the bumper 8 is absorbed by the partition wall. 11 and 12, and prevents air from flowing into the cab chamber C via the space B, the air intake port 6a of the ventilator, etc.
It is possible to reduce internal noise.

Further, in the present invention, the partition walls 11 and 12 are formed into a rectangular shape to correspond to the radiator grille 2, so that outside air can be efficiently introduced into the space B and the air intake ports 7r and 7l through the radiator grille 2. In addition, the air intake ports 7r and 7l open on both sides of the partition walls 11 and 12 and can supply outside air to both the passenger side and the driver side of the cab room C, thereby creating an effective and uniform bench. ration function can be obtained.

As described above, the present invention provides a rectangular partition wall that defines the space defined by the radiator grille and cab panel into an outside air introduction passage communicating with the radiator and a space communicating with the ventilator outside thereof. The air intake of the ventilator is opened on both sides of the outside air inlet, which prevents interference between the cooling air to the radiator and the airflow to the ventilator, increasing the cooling efficiency of the radiator. The effect of reducing noise inside the cab by preventing noise from being transmitted to the inside of the cab via the ventilator can be achieved with a simple structure. Further, according to the present invention, there is an advantage that effective and uniform ventilation can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a cab showing a conventional example.
FIG. 2 is also a perspective view. FIG. 3 is a perspective view of a cab showing an embodiment of the present invention, FIG. 4 is a perspective view of a radiator grill, FIG. 5 is a sectional view of the cab, and FIG. 6 is a perspective view of a partition engaging portion. It is an enlarged sectional view. A... Outside air introduction passage, B... Space, C... Cab room, 1... Cab, 2... Radiator grill,
3...Radiator, 5...Cabin panel, 6a,
6b, 7l, 7r...Air intake of the ventilator.

Claims (1)

[Claims for Utility Model Registration] (1) In a cab front shape in which a space is provided between the cab's radiator grille and the cab panel in which the radiator's outside air introduction passage and the ventilator's air intake are formed, A partition wall that defines the space in which the air intake port of the ventilator opens and the outside air introduction passage of the radiator is formed into a rectangular shape that surrounds the outside air introduction passage of the radiator from the side and top surface. The cab front structure is characterized by ventilator air intakes opening on the outside on both sides. (2) The cab front structure according to claim 1, wherein the partition wall is formed on at least one of the radiator grille side and the cab panel side.