JPH081135Y2 - Fuel tank mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a fuel tank mounting structure.

(Prior art and its problems) As crane vehicles, truck crane vehicles developed from truck-based crane mounting, rough terrain crane vehicles that emphasize mobility on site, and all-terrain cranes that combine mobility and traveling performance The car is known. In these crane vehicles, a large-capacity fuel tank of about 400 liters is usually mounted on the side wall of the chassis frame.

By the way, in the above-mentioned mobile crane, it is preferable to shorten the wheel base in order to improve the maneuverability on site. However, since it is necessary to mount a large number of various auxiliary machines, various equipment for field work, maintenance items, etc., on a mobile crane, installing the above-mentioned large-capacity fuel tank on a wheel chassis with a short chassis causes Therefore, the mounting space for auxiliary machinery and the like will be very limited.

Further, if the fuel tank is attached to the side wall of the chassis frame as described above, it is not preferable because the fuel tank is directly impacted when a side collision occurs during a rear-end collision.

The present invention has been made in view of the above conventional problems,
The effective use of the vehicle body space when installing the fuel tank secures the installation space for auxiliary machinery, instruments, maintenance items, etc., and also reduces the impact at the time of a rear-end collision such as a side collision, thus ensuring tank safety. It is an object of the present invention to provide a fuel tank mounting structure with improved fuel efficiency.

(Means for Solving the Problems) According to the fuel tank mounting structure of the present invention for achieving the above object, a pair of substantially parallel side members extending in the vehicle front-rear direction and a pair of side members extending in the vehicle front-rear direction are provided. A pair of vertical frames and a pair of horizontal frames extending in the vehicle width direction are formed by combining them in a cross beam shape, and are arranged between the pair of side members so that the pair of vertical frames are at four positions at the front and rear ends. Attached to the pair of side members with
Further, a tank mounting frame in which only one of the mounting points is mounted via a rubber mount, and a fuel tank fixed to the pair of horizontal frames by belt members whose both ends are respectively connected to the pair of vertical frames. , A vibration preventing means having a cushion rubber which is interposed between the pair of side members and the upper portion of the fuel tank and which can absorb vibration of the fuel tank in the vehicle width direction.

(Operation) A tank mounting frame formed in a double girder shape is arranged between a pair of left and right side frames, four front and rear ends are mounted on these side frames, and only one of the mounting positions is interposed by a rubber mount. To prevent the side frame from twisting and deforming, affecting the fuel tank.
In addition, the fuel tank is prevented from oscillating from side to side by the anti-vibration means modified between the side frame and the upper portion of the fuel tank. As a result, the fuel tank can be securely fixed without being subjected to vibrations or unreasonable force, and can be protected from an impact such as a vehicle side collision.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an appearance of an all-terrain crane vehicle to which the present invention is applied. The all-terrain crane vehicle 1 includes a work frame (chassis frame) 2 extending over substantially the entire length of a vehicle, a counterweight 6 and a counterweight 6 via a turntable 4. Boom 7
And a carrier house 8 is provided on the front frame 3 extending forward from the front end of the chassis frame 2, and a crane house 9 that rotates with the crane 5 is provided on the turntable 4. The crane vehicle 1 can be operated in each of the houses 8 and 9.

Outrigger boxes 10, 11 accommodating front outriggers and rear outriggers (both not shown) are provided at the front and rear ends of the chassis frame 2, and when the crane 5 is suspended, these front and rear outriggers are installed. The chassis frame 2 is fixed by jutting out in the lateral direction, the chassis frame 2 is fixed, the crane house 9 is operated, the crane 5 is rotated together with the house 9 in a desired direction, and the hanging work is performed. Between the outrigger boxes 10 and 11, front wheels 12 and rear wheels 13 are attached adjacent to the boxes 10 and 11.

Left and right side members of chassis frame 2 that are parallel to each other
2a, 2a are outer panels 2b, 2b, inner panel 2c,
2c, upper plates 2d, 2d and lower plates 2e, 2e have a so-called box-shaped closed cross-section structure (FIG. 4), and a cross member (not shown) having a box-shaped closed cross section at its front and rear ends as well. ) Is stuck. That is, the chassis frame 2 is a ring-shaped frame body composed of a side member and a cross member having a closed cross-section structure with the turntable 4 interposed therebetween, and the frame body ensures high torsional rigidity and bending rigidity. ing. Therefore, a cross member is not required other than the front and rear ends, and therefore a large space can be secured between the side members.

The fuel tank 14 is arranged between the left and right side members at the rear of the vehicle body. Specifically, the fuel tank 14 is placed on the tank mounting frame 16 fixed to the rear outrigger box 11 and the rear leaf spring bracket 15, and its four corners are fixed to the inner panel of the side member.

2 and 3 show the tank mounting frame 16,
The mounting frame 16 is composed of two vertical frame members 16a, 16a extending in the front-rear direction of the vehicle body and two horizontal frame members 16b, 16b extending in the vehicle body width direction.
16a, 16a, 16b, 16b are combined in a cross pattern and fixed to each other as illustrated. That is, the frame members 16a and 16b
Both have a U-shaped cross section, and both ends of the horizontal frame member 16b are inserted into the vertical frame member 16a and welded to each other (FIG. 3). Further, on the upper surface of each of these frame members, that is, the surface on which the fuel tank 14 is placed, along the longitudinal direction, a cushioning material such as a rubber sheet is provided.
30 and 31 are attached (Fig. 2). Further, a bracket 17 for attaching fixed belts 23 and 24, which will be described later, is integrally formed on the side surface of the vertical frame member 16a. The front and rear portions of the vertical frame member 16a are provided with bolt holes 16c and 16 respectively.
d is formed.

Then, as shown in FIGS. 3 to 5, the front portion of the vertical frame member 16a has a leaf spring bracket 15 (first
A bracket 18 having a substantially U-shaped cross section fixed to the drawing), and a rear portion of the bracket 18 having a substantially L-shaped cross section fixed to the outrigger box 11 (FIG. 1) are screwed by bolts 20 and 21, respectively. .

4 to 6 show the fuel tank on the mounting frame 16 described above between the side members of the chassis frame 2.
It is a figure which shows the state which has arrange | positioned 14. A leaf spring bracket 15 is fixed to the lower surface of the lower plate 2e of the side member 2a, and a bracket 18 is fixed to the leaf spring bracket 15. As described above, the mounting frame 16 is screwed to the brackets 18 and 19 at a total of four positions of the front portion and the rear portion of the vertical frame 16a, one of which is, for example, the left vertical frame as shown in FIG. At the front portion of 16a, a rubber member 22 for cushioning the vibration of the vehicle body is interposed between the lower surface of the vertical frame 16a and the upper surface of the bracket 18. Specifically, as shown in FIG. 5, the bracket
A rubber member 22 is interposed between the upper surface 18a of 18 and the lower surface 16a 'of the vertical frame member 16a, and they are integrally tightened and fixed by a bolt 20 and a nut 41.

Fixed belts 23 and 24 are stretched around the fuel tank 14 at predetermined intervals in parallel with each other (FIG. 6). This belt 2
3 and 24 are made of metal, for example, and bolts 25 and 25 are fixed to both ends thereof (Fig. 4). The bolts 25 and 25 are respectively inserted into the holes of the bracket 17 of the vertical frame member 16a to tighten the nuts. The belts 23 and 24 are brought into close contact with the left and right side walls and the outer surface of the upper wall of the tank 14 by 42 and 43, and are fastened until they are firmly fixed (Fig. 5).

Further, at the upper four corners of the fuel tank 14, vibration prevention means are provided.
32 are provided (FIGS. 4 and 7). On the other hand, the inner plate 2c of the side member 2a has a base portion 34a and a locking portion 34b.
A bracket 34 consisting of is welded. The locking portion 34b has a curved shape substantially similar to the curved shape of the upper edge of the tank 14,
Moreover, it has a width enough to cover the side wall of the tank 14. Then, the cushion rubber 3 is provided between the plate 33 and the locking portion 34b.
5 are interposed, and these are integrally screwed by a bolt 36.

When installing the fuel tank 14 on the body of a mobile crane,
First, place the tank 14 on the mounting frame 16 and
14 The four corners of the upper part are fixed to the inner panel 2c of the side member 2a by the vibration preventing means 32, respectively, and then fixed to the mounting frame 16 by the belts 23 and 24. In such a configuration,
By tightening the left front portion of the vertical frame member 16a of the frame 16 with the rubber mount, it is possible to prevent an unreasonable force from being applied to the tank 14 when the left and right side members 2a, 2a are deformed. Further, by fixing the upper four corners of the fuel tank 15 to the inner panels 2c, 2c of the side members 2a, 2a via the cushioning material 35, vibration of the fuel tank is prevented.

(Effect of the Invention) As described above, according to the fuel tank mounting structure of the present invention, a pair of substantially parallel side members extending in the vehicle front-rear direction, a pair of vertical frames extending in the vehicle front-rear direction, and a vehicle. A pair of horizontal frames extending in the width direction are formed by combining them in a cross beam shape, and are arranged between the pair of side members so that the pair of vertical frames are provided at the front and rear ends.
The tank mounting frame is attached to the pair of side members at one place, and only one of the attaching positions is attached via a rubber mount; and the belt members whose both ends are connected to the pair of vertical frames. Vibration prevention having a fuel tank fixed to a pair of horizontal frames, and a cushion rubber interposed between the pair of side members and an upper portion of the fuel tank and capable of absorbing vibration in the vehicle width direction of the fuel tank. Since it is configured with means, it is possible to save space, the fuel tank is not exposed to the outside of the vehicle body, and is protected by the chassis frame, so the impact is mitigated even in the case of a rear-end collision such as a side collision, It is possible to improve the safety of the tank. Further, it is possible to prevent an unreasonable force from acting on the fuel tank due to the twisting deformation of the side frame, and further to prevent the vibration in the left and right directions, so that the fuel tank can be securely fixed. There is.

[Brief description of drawings]

1 to 7 show an embodiment of a fuel tank mounting structure of the present invention, FIG. 1 is an external view of an all-terrain crane vehicle to which the present invention is applied, and FIG. 2 is a fuel tank mounting frame. FIG. 3 is a top view, FIG. 3 is a perspective view showing the details of the frame shown in FIG. 2, FIG. 4 is a rear view of the state in which a fuel tank is attached between chassis frames as seen from the rear of the vehicle body, and FIG. 5 is a fuel tank. FIG. 6 is an enlarged cross-sectional view of an essential part showing a mounted state of a lower portion, FIG. 6 is a side view of FIG. 4, and FIG. 7 is a perspective view of an essential part showing a mounted state on a side member above a fuel tank. 1 ... All-terrain mobile crane, 2 ... Chassis frame, 2a ... Side member, 2c ... Inner panel, 11 ...
Outrigger box, 14 …… Fuel tank, 15 …… Rear spring bracket, 16 …… Tank mounting frame, 16
a, 16b …… frame member, 17, 18, 19 …… bracket,
23, 24 …… Fixing belt, 32 …… Vibration prevention means.

Claims (1)

[Scope of utility model registration request] 1. A pair of substantially parallel side members extending in the vehicle front-rear direction, a pair of vertical frames extending in the vehicle front-rear direction, and a pair of horizontal frames extending in the vehicle width direction are combined in a cross beam shape. At the same time, the pair of vertical frames are arranged between the pair of side members and are attached to the pair of side members at four positions on the front and rear ends.
A tank mounting frame only attached at a location via a rubber mount, a fuel tank fixed to the pair of horizontal frames by belt members whose both ends are connected to the pair of vertical frames, and the pair of side members And a vibration preventing means having a cushion rubber interposed between the fuel tank and an upper portion of the fuel tank and capable of absorbing vibration of the fuel tank in the vehicle width direction.