JPH05456Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a protective structure for a fuel tank in a working vehicle such as an agricultural tractor.

[Problems to be solved by the prior art and the invention] Generally, some work vehicles of this type are equipped with a safety frame to ensure the safety of the driver. It is attached to the main body of the aircraft in a vibration-proof manner to prevent vibrations from being transmitted directly to improve comfort. Incidentally, recently, vehicles have been produced in which a fuel tank is provided between the rear column of the safety frame and the driver's seat.
However, in the past, the frame rear strut was installed at a low vibration-proof mounting position (height) relative to the fuselage body, so when a forward load was applied to the safety frame and the frame rear strut tilted forward, There is a risk that the rear support of the frame will press on the fuel tank and cause damage to the tank.
The drawback is that it must either be narrow in width to fit between the left and right rear columns, or have a special shape with a concave portion corresponding to the rear columns.

[Means for solving the problem] In view of the above-mentioned circumstances, the present invention was devised for the purpose of providing a protective structure for a fuel tank in a work vehicle that can eliminate these drawbacks. In a work vehicle configured to protect a worker sitting in a driver's seat using a safety frame that is attached to the body of the machine in a vibration-proof manner, a fuel tank is connected to the driver's seat, At the rear position of the driver's seat, the left and right rear columns of the safety frame are installed in front and between the rear support columns, which are integrally erected from the aircraft body at the rear position, and the left and right rear columns of the safety frame are respectively attached to the upper end for vibration isolation. The vibration-proof mounting height of the rear strut of the safety frame relative to the support strut shall be approximately the same height as the upper position of the fuel tank, and each of the left and right rear support struts shall be
It is characterized by being supported on the fuselage body side near the inside of the left and right fenders at a position that overlaps the fuel tank when viewed from the rear.

With this configuration, the present invention allows the fuel tank to be wide on the left and right sides and to be protected.

[Example] Next, an example of the present invention will be described based on the drawings. In the drawings, reference numeral 1 denotes a traveling body of an agricultural tractor, which includes a clutch housing 2, a center case 3, and a body frame of the traveling body 1.
An operation control section 5 is formed above the mission case 4. Reference numeral 6 denotes a safety frame in which the present invention is implemented, and a front support column 7 of the safety frame 6 is connected to a clutch housing 2 through a mounting bracket 8.
is installed on. In other words, the distal end 8a of the mounting bracket 8, which is integrally bolted to the clutch housing 2, is cylindrical, and the lower end 7b of the frame front column 7 is inserted into this to form a fixing device consisting of a bolt and nut. The frame front column 7 is mounted in a vibration-proof manner on the mounting bracket 8 by being integrally fastened by means 7a. Here, 8b is a vibration damping material made of a rubber elastic body, and 8c is a collar.

Further, the left and right frame rear support columns 9 are attached to the upper ends of left and right rear support columns 11 integrally erected from the rear axle case 10 on the fuselage body side in a vibration-proof manner as described later. Reference numeral 12 denotes a fuel tank, which is disposed between the rear of the driver's seat 13 and the rear support column 11.
overlaps the fuel tank 12 in the rear view near the inside of the left and right fenders 26, and furthermore, the rear support column 11 and the frame rear column 9 are at approximately the same height with respect to the upper surface of the fuel tank 12. They are connected in a vibration-proof manner. That is, a cylindrical connecting seat 14 with an open bottom is integrally provided at the lower end of the frame rear column 9. On the other hand, a cylindrical connecting seat 15 with openings on both left and right sides is integrally provided at the upper end of the rear support column 11, and inside this connecting seat 15 there is a cylindrical barrier made of a rubber elastic body. The vibration damping material 16 is tightly fitted, and the connecting seat 15 of the vibration damping material 16
A vibration isolating material 16a is fixed to the outer periphery of the portion protruding from the edge so as to substantially coincide with the outer periphery of the connecting seat 15 which has a gap with respect to the connecting seat 14. Then, the connecting seat 15 is fitted into the connecting seat 14 on the side of the frame rear column 9, and the hole 14a formed in the connecting seat 14 is inserted.
The collar 17 is inserted while aligning so that the hole 16b of the vibration isolating material 16 is aligned with the hole 16b of the vibration isolating material 16, and then the collar 17 is fastened and fixed using a fixture 18 consisting of a bolt-nut and a retaining pin. By doing so, both the supports 9 and 11 can be connected in a vibration-proof manner.

Furthermore, in this embodiment, the following considerations are also taken. In other words, when working in the field, the rear wheels 19, 19a may be installed as double tires, but in this case, the rear axle case 10
A spacer 21 integrally attached to the tip of the rear axle shaft 20 protruding from the rear axle shaft 20 has an inner flange 21a for attaching the inner rear wheel 19 and an outer rear wheel 1.
An outer flange 21b for mounting the tire 9a is formed, but both flanges 21a and 21b have tire mounting screw holes 21c and 21d arranged in an alternating manner.
The portions corresponding to the mutually opposing screw holes 21c and 21d are chamfered, so that the outer flange 21b does not get in the way, especially when installing the inner rear wheel 19, and the attachment/detachment work using the tool 25 is facilitated. Care has been taken to ensure that

Furthermore, consideration has been given to the vibration isolation structure of the bonnet 22. For example, an elastic material such as a soft foam material or rubber material is attached to the inner surface of the side cover 22a of the bonnet 22 as the vibration isolating material 23. In this case, the vibration isolating material 23 has conventionally been adapted to fit the inner surface shape of the side cover 22a. It was cut into a complicated shape, and a double-sided adhesive tape 24 was pasted thereon before it was attached to the inner surface of the cover. However, if this is done, the installation work of the vibration isolating material 23 becomes troublesome and complicated, so the area to which the double-sided adhesive tape 25 is attached is the adhesive tape 2.
5 is cut into a substantially straight shape for easy installation, and the inside of the vibration isolating material 23 is cut into a straight shape for easy installation.
When it is cut to approximately match the shape of the side cover 2a and is pasted on the inner surface of the side cover 22a, the vibration isolating material 23 deforms approximately along the inner surface shape of the side cover 22a, thereby forming an anti-vibration material. Shaking material 23
When the bonnet 22 is closed, the contents 2
The bonnet 22 substantially conforms to the outer surface shape of the bonnet 22 and is elastically abutted thereon to provide vibration and sound insulation for the bonnet 22, thereby improving the installation and workability of the vibration isolating material 23.

In the embodiment of the present invention configured as described above, the safety frame 6 has both the front and rear struts 7 and 9 attached to the fuselage side in a vibration-proof manner, so that vibrations of the aircraft body are not transmitted to the safety frame 6. However, in this device, the fuel tank 12 is disposed between the driver's seat 13 and the rear support strut 11 to which the frame rear strut 9 is attached for vibration isolation, and between the left and right fenders 26. Near the inside, the rear support strut 11 is connected to the fuel tank 1 when viewed from the rear.
As a result, the fuel tank 12 is surrounded in the front, rear, left and right directions by the driver's seat 13, the rear support column 11, and the left and right fenders 26, thereby becoming a strength member. Fuel tank 1 using rear support strut 11
Effective protection from behind 2 can be measured.

Furthermore, since the frame rear support column 9 is connected to the rear support column 11 on the aircraft side that supports it at a height approximately equivalent to the upper position of the fuel tank 12, a forward load is applied to the safety frame 6. In addition, even if the frame rear strut 9 tilts forward, the fuel tank 12 will not be compressed by the tilted frame rear strut 9, and therefore the fuel tank 12 will have a horizontal width equal to the frame rear strut 9. Even if it is made wider so that it overlaps with 9, and the front and rear thicknesses can be made thinner if the tank capacity is the same, it will still be protected. Moreover, even if it is widened so as to overlap with the frame rear column 92, the shape does not have to be a complicated shape with a concave overlap part, but can be a simple shape, which is easy to process and contributes to cost reduction. become.

[Operations and Effects] In summary, since the present invention is constructed as described above, the fuel tank is disposed between the front and back of the driver's seat and the rear support column, and is also located at the rear near the inside of the left and right fenders. The support column is arranged so as to overlap the fuel tank in rear view. As a result, the fuel tank is surrounded by the driver's seat, the rear support struts, and the left and right fenders in the front, rear, left, and right directions. This will provide effective protection from behind the tank.

Furthermore, since the vibration-proof mounting position of the rear support strut of the safety frame is approximately the same as the top of the fuel tank, a forward load is applied to the safety frame, causing the frame rear strut to tilt forward. Even if the fuel tank is widened in the left and right direction so as to overlap with the rear column of the frame, there is no pressure on the fuel tank, and there is no support at all. In addition, there is no need for the tank to have a special shape with a concave portion, which can greatly contribute to cost reduction.

[Brief explanation of the drawing]

The drawings show an embodiment of the protective structure for a fuel tank in a work vehicle according to the present invention, in which Fig. 1 is a partially cutaway side view of an agricultural tractor, and Fig. 2 is a front view of the same. , Figure 3 is a rear view of the same as above,
FIG. 4 is a longitudinal cross-sectional view of the frame front strut attachment site, FIG. 5 is a cross-sectional view of the frame rear strut attachment site, FIG. 6 is a longitudinal cross-sectional view of the same as above, and FIG. 7 is an agricultural tractor showing the second embodiment. A partially cutaway side view of
Fig. 8 is a longitudinal cross-sectional view of the rear strut attachment portion of the same frame, Fig. 9 is a longitudinal cross-sectional view of the rear wheel mounted using the double tire method, and Fig. 10 A and B are longitudinal cross-sectional views of the rear wheel mounting spacer. FIG. 11 is a front view, FIG. 11 is an operational explanatory view showing the rear wheel attached state, FIG. 12 is a schematic vertical sectional view of the bonnet portion, and FIG. 13 is an operational explanatory view. In the figure, 1 is a traveling aircraft body, 6 is a safety frame, 9 is a frame rear column, 11 is a rear support column, and 12 is a fuel tank.

Claims (1)

[Scope of utility model registration request] In a work vehicle configured to protect a worker sitting in a driver's seat using a safety frame that is attached to the main body of the machine in an anti-vibration manner,
The fuel tank is installed between the driver's seat and the rear support strut, which stands integrally from the aircraft body at a position behind the driver's seat, and to which the left and right rear struts of the safety frame are respectively attached to the upper end for vibration isolation. The vibration-proof mounting height of the rear strut of the safety frame relative to the rear support strut is approximately the same height as the upper position of the fuel tank, and the left and right rear support struts are located between the left and right fenders. A protection structure for a fuel tank in a work vehicle, characterized in that the fuel tank is supported on the body side of the vehicle at a position that overlaps the fuel tank when viewed from the rear, near the inside of the fuel tank.