JPS5920510B2 - construction vehicle engine cover - Google Patents

Description

[Detailed description of the invention] The present invention relates to an engine cover for a construction vehicle.

Conventionally, the engine cover of a construction vehicle such as a bulldozer has been constructed of, for example, a radiator guard b fixed to a vehicle body a, a dash board c, a bonnet d fixedly fixed over the radiator guard b and dash board C, as shown in FIG. To remove the engine cover, remove the radiator guard b
Since the engine cover must be removed by loosening the bolts, it is very troublesome to remove the engine cover.

The present invention has been made in view of the above circumstances, and its purpose is to provide an engine cover for a construction vehicle in which the engine cover is integrated and rotatably attached to the vehicle body so that the engine cover can be easily removed. Is Rukoto.

The present invention will be described in detail below with reference to FIG. 2 and subsequent figures.

Suspension mechanisms 2 are mounted on both sides of the vehicle body 1, and each suspension mechanism 2 has a trunnion 3 protruding from it, and both ends of a U frame 4 are pivotally connected to each trunnion 3. , a blade 5 is attached to the front end of the U frame 4.

The engine cover 6 has a U-shape with an open bottom formed by side walls 6a, 6a, an upper wall, a front wall 6c which becomes a radiator mast, and a rear wall 6d, and a bracket 7 is located below the front end of both side walls 6a. It is integrally formed.

The lower edges of both side walls 6a of the engine cover 6 are connected to the vehicle body 1.
A pin 10 is fitted into the bracket 7 and a bracket 9 integrally formed on both sides of the front end of the vehicle body 1, and the engine cover 6 is attached to this pin. It can be rotated around 10 to face forward.

Reference numeral 11 denotes a mounting member 1 located near the front of both side walls 6a of the engine cover 6.
A pair of left and right cylinders rotatably attached via 2.
The piston rod 13 of each cylinder 11 has a blade 5
Pivot connection on both sides of the back.

Also, a stopper piece 14 is fixedly provided on the rear side of both side walls 6a of the engine cover 6, and this stopper piece 14 comes into contact with an elastic piece 15 made of rubber or the like fixedly provided on the vehicle body 1, so that the engine cover 6
The position of the rotation direction is regulated.

16 is a buffer piece fixed to the front wall 6c of the engine cover 6;
When the engine cover 6 rotates forward, it comes into contact with the upper end surface 5a of the blade 5.

Then, loosen the bolts 8 and remove the side walls 6 of the engine cover 6.
If you release the fixation between a and the vehicle body 1 and retract the piston rod 13 of the cylinder 11, the engine cover 6 will be moved to the pin 10.
It rotates forward and upward about , and reaches an open position where the buffer material 16 comes into contact with the upper end surface 5a of the blade, as shown by the imaginary line in FIG.

In this state, the engine cover 6 is separated from the vehicle body 1 and does not interfere with maintenance of the engine or the like.

Also, from the above-mentioned state, the piston rod 1 of the cylinder 11
3 is extended, the engine cover 6 rotates rearward about the pin 10, and the stopper piece 14 comes into contact with the elastic piece 15 to reach the position shown by the solid line.

Note that in order to enable the engine cover 6 to rotate with the cylinder 11, the position of the pin 10 must be set so as to satisfy the following equation.

However, the dance is the weight L of the engine cover 6, C is the distance M between the pin 10 and the center of gravity G1 of the engine cover 6, and D is the pin center 10.
The distance between a and the center line XX of the cylinder 11, h is the weight of the blade 5 and arm 4, B is the distance from the trunnion center 3a to the center of gravity G2 of the blade 5 and arm 4, and A is the distance from the trunnion center 3a to the cylinder. Distance from center line XX of 11.

In other words, if the thrust of the cylinder 11 is F, the connecting pin 1
The moment around 0 is F, D=1-, C, and the moment around U frame trunnion 3 is , B=
F and A become.

Here, in order for only the engine cover 6 to be lifted up without the blade 5 being lifted up, equations (1) and (2) are used.

Since the present invention is configured as described above, the engine cover 6 can be rotated about the pin 10 between the closed position and the open position, so that the engine cover 6 can be easily removed, and the maintainability of the engine can be improved.

Still, since the engine cover 6 can be rotated upward around the pin 10 using the cylinder 11 that raises and lowers the blade 5, there is no need to provide a special cylinder to rotate the engine cover 6, which reduces costs. It can be done cheaply.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a conventional example, Figs. 2 to 6 show an embodiment of the present invention, Fig. 2 is a perspective view, Fig. 3 is a front view, and Fig. 4 is the same as Fig. 3. IV-IV line sectional view, Figure 5 is the 3rd
Figure 6 shows the ``Visual surface view'' of Fig. 3. 1 is the vehicle body, 6 is the engine cover, 6a is both side walls, 6b is the earthen wall, and 10 is the pin.

Claims (1)

[Claims] 1 Suspension mechanisms 2 are installed on both sides of the vehicle body 1, and the base end of an arm 4 for supporting a blade is connected to each suspension mechanism 2 via a trunnion 3 so as to be vertically swingable. The blade 5 is connected to the tip of the arm 4 for supporting the blade, and an engine cover 6 of an integral structure with an open bottom is formed by both side walls 6a and an upper wall 6b, and the lower edges of the side walls 6a of the engine cover 6 are Bolts 8 are tightened and fixed across both sides of the vehicle body 1, and a pin 10 is fitted between the front end of the engine cover 6 and the front end of the vehicle body 1, so that the engine cover 6 can rotate around the pin 10. A cylinder 11 for lifting and lowering the blade is pivotally connected between the engine cover 6 and the blade 5 or the frame 4 for supporting the blade, and the position of the pin 10 is adjusted between the blade 5 and the frame 4 for supporting the blade. This engine cover for a construction vehicle is characterized in that the force for swinging the frame 4 upward about the trunnion 3 is greater than the force for rotating the engine cover 6 upward about the pin 10.